Category: Diamond 101

Categories
4C

Comparison of Cushion Cut and Princess Cut Diamonds

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details

When you start to pick out a diamond, Cushion Cut and Princess Cut are two of the most well-liked styles besides the standard Round Brilliant Cut. Both of them have their own special charm, but they show totally different styles. In the end, your final pick will depend on your personal taste, daily lifestyle and how much money you plan to spend.

Cushion Cut

This is a really old diamond cut, and it has a history of nearly 200 years. It features soft rounded corners and gentle outlines, which bring people a feeling of retro, classic and elegance.

The cushion cut mixes the romance of round diamonds and the unique look of square diamonds. It is perfect for people who love personalized designs and vintage styles.

It creates a one-of-a-kind sparkle. The large and open facets of this cut can produce soft bright light and amazing rainbow fire, which people often describe as the “broken glass” effect. Some people also call this special light the “pouch shine”, and the visual effect is absolutely distinctive.

Vintage elegance is the biggest feature of cushion cut diamonds. They carry a warm and classic temperament, so they match perfectly with all kinds of vintage jewelry designs.

Another good point is its great durability. Since there are no sharp corners on a cushion cut diamond, it is not easy to crack or chip. It is a wonderful choice for people who want to wear diamond jewelry every single day.

What’s more, cushion cut diamonds also have a good cost performance. The cutting process wastes less rough stone, so the price per carat is usual lower than Princess Cut diamonds.

There are also some points you need to keep an eye on when shopping.

First is the bow-tie effect. Some cushion cut diamonds will have dark shadow areas on the top table, which looks just like a bow tie. You have to check every diamond carefully before you make your decision.

Second, cushion cut diamonds tend to look smaller visually. Because craftsmen cut the pavilion part deeper, a cushion cut diamond with the same carat weight may seems smaller than a Princess Cut one.

Comparison of Cushion Cut and Princess Cut Diamonds

Princess Cut: A Modern and Stylish Choice

Princess Cut ranks top among all fancy diamond cuts. It is famous for its modern vibe and brilliant sparkling light.

It is one of the shiniest diamond cuts after round brilliant diamonds. A princess cut diamond has plenty of complex small facets. These facets can reflect a huge amount of light, so it owns outstanding brilliance and fire.

With clear lines and sharp corners, princess cut diamonds deliver a simple, modern and fashionable sense. This cut came out in the mid-20th century and became popular widely after the 1960s. Its sharp angles and neat lines show a bold and trendy style for modern life.

Now it has become the second most popular cut right after round diamonds. It is extremely common on engagement rings, and many people who prefer clean geometric shapes fall in love with this cut.

When it comes to visual size, princess cut diamonds perform very well. Its cutting design lets most of the diamond weight gather above the girdle. For this reason, a princess cut diamond will looks bigger than many other cuts with the same carat weight.

It is also a timeless classic on the market. Princess Cut has a high recognition all over the world, and it never goes out of style.

Here are the notes for Princess Cut diamonds.

The four sharp corners are the weakest parts of the whole diamond. You must use prongs to cover and protect these corners. If not, the corners are easy to chip or break when hit by hard objects.

Besides, princess cut diamonds are more expensive. The cutting work is quite complicated, and more rough diamond will be lost during processing. That makes its per carat price generally higher.

Main Differences Between Cushion Cut and Princess Cut

Cushion Cut has rounded square or rectangular shapes, just like a soft pillow. Its style is classic, mild, romantic and full of retro feelings. The facets are large and open, creating the famous broken glass effect. Fire is its strongest point, and light scatters into beautiful rainbow colors. Its pavilion is usually deep, so the bow-tie effect appears easily. It works great with vintage styles and halo setting designs. With round edges, it is tough and hard to damage, so it is durable for daily wear. Yet it looks smaller in vision because of the deep cut and small table surface.

Princess Cut comes with sharp square or rectangular shapes with strong geometric features. It presents a modern, sharp, stylish and structured style. It is covered with many V-shaped facets, bringing strong brilliance and fire. Craftsmen design this cut to maximize shine, so obvious bow-tie shadow hardly appears. It often uses classic four-prong or six-prong settings, and protection for sharp corners is a must. It costs more for larger cutting loss and complex craft. Thanks to its good proportion on the table, it visually appears larger than other cuts at the same weight.

The best way to choose is to see and compare these two cuts in person. Watch real diamonds of different shapes under natural sunlight, and feel which kind of light and style touches your heart more. This is a highly personal decision related to your own aesthetic and living habits.

If you have a limited budget and love vintage styles, cushion cut is your ideal option. If you chase extreme sparkle and modern design, and you have enough budget, princess cut will never let you down.

Pictures and short videos online can never show the real shine of a diamond fully. If you have the chance, do go to check and compare these two cuts face to face. Feel the soft fire of cushion cut diamonds and the bright sparkle of princess cut ones, then pick the one you like best.

You also need to think about the ring setting you want. Cushion cut diamonds and halo settings are a perfect match. As for princess cut diamonds, you must make sure the setting can fully protect its four sharp corners.

No matter which cut you finally choose, always buy diamonds from trustworthy sellers. Make sure the diamond comes with official grading certificates, such as GIA or IGI reports. These professional documents can prove the good quality of your diamond.

Categories
Blue Nile

Blue Nile vs Tiffany Diamond Comparison

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details

Blue Nile and Tiffany represent two totally different business models for diamond shopping. Tiffany & Co. focuses on offline shopping experience, placing great value on brand heritage, inheritance, luxury and worry-free service. It is just like an exclusive luxury diamond salon. When you shop here, you are not only buying a diamond, but also a legendary story, exquisite design and top-level consumer protection.

Blue Nile mainly operates online. It pays more attention to cost performance and rich product choices. To put it simply, Blue Nile works like a large diamond discount store. Customers can filter diamonds by detailed data and specifications, and get high-quality diamonds with better value at a lower cost.

Diamond Quality & Certification: Blue Nile vs Tiffany

Most diamonds sold by Blue Nile come with GIA certificates, which stands for the Gemological Institute of America. This is the most authoritative and widely recognized diamond grading standard across the world. Customers can check and compare all parameters of different diamonds clearly, including the 4Cs and fluorescence, so there is an extremely wide range of choices. However, the quality of diamonds here varies a lot, so you need to spend enough time to pick out fine-quality pieces.

Tiffany & Co. never uses GIA certificates or any third-party certification. The brand has set its own extremely strict grading rules, known as the Tiffany® Diamond Standard, and only issues its own certificates for its products. People in the industry generally agree that Tiffany’s internal standards are stricter than the universal industry rules. For example, its evaluation on diamond color and clarity is more rigorous than the same grades given by GIA. On the downside, it is impossible to make direct and objective data comparison between Tiffany diamonds and products from other brands.

Price & Cost Performance: Blue Nile vs Tiffany

Since Blue Nile runs its business mostly online, it cuts down lots of operating costs. For this reason, it can offer diamonds at very competitive prices. If you have a limited budget, you are likely to get a larger diamond or one with better parameters at Blue Nile.

The price of Tiffany diamonds includes a huge brand premium. You pay for its iconic blue box, long history, outstanding design, thoughtful service and consistent global quality standards. Tiffany diamonds are pure luxury goods. The brand owns the patented Tiffany True® cut and the world-famous Tiffany® Setting with six prongs. These professional cutting techniques are designed to bring out the maximum fire and brilliance of diamonds. Tiffany claims its cutting standard is far above the Excellent grade. This is a key part of its brand premium.

There is a huge price gap between the two brands. Take 80,000 Hong Kong dollars as an example. With this budget, you can buy a 1 carat diamond with GIA Excellent cut and decent quality at Blue Nile. But at Tiffany, the same money can only get a diamond ring of 0.5 or 0.7 carats with similar parameters.

Shopping Experience & After-sales Service: Blue Nile vs Tiffany

Shopping on Blue Nile is a modern e-commerce style experience. You can browse hundreds of thousands of diamonds at home and use filter tools to make comparisons. You can contact online customer service whenever you have questions. Your purchase can be delivered to your home, or you can pick it up at local experience stores. So as for follow up services such as maintenance and ring resizing.

For Tiffany & Co., shopping experience is the core of its brand. When you step into its flagship stores, you will receive one-on-one service from professional consultants. You can try on various classic styles and immerse yourself in the brand’s long history and elegant atmosphere. After purchase, customers can enjoy free lifetime cleaning, maintenance and setting inspection. The whole experience is relaxing and distinguished.

Overall Comparison and Suggestions

Blue Nile takes cost performance, diverse choices and transparent data as its core advantages. It runs mainly online to reduce intermediate links and inventory costs. The brand sources diamonds globally with a complete supply chain system, and its products are equipped with standard GIA certificates covering all cut grades. Its prices are much lower, usually 30% to 50% cheaper than similar products from luxury brands. It has a large variety of styles, focusing on basic inlay design. It is more suitable for rational shoppers who care about budget, like doing research and value the diamond itself.

Tiffany & Co. centers on brand inheritance, fine craftsmanship and premium luxury experience. It relies on offline boutiques and controls diamond sources through strict internal selection. It uses exclusive self-made certificates and patented cutting technology which is claimed to exceed top industry levels. Its products carry a high brand premium. The classic designs have high recognition and collection value. It wins over customers with noble offline service and lifetime after-sales support, and it is popular among people who pursue top-tier experience, brand reputation and social value.

If you put cost performance in the first place, and want to get the best possible 4C parameters within your budget, Blue Nile is a great choice. It fits people who enjoy doing research, trust professional data and specifications, and do not care much about brand fame. What you get here is a genuine high-quality diamond.

If you chase an exclusive shopping journey, fascinating brand stories and a strong sense of identity, Tiffany will be your ideal pick. If the iconic blue box means a lot to you, and you hope to save the trouble of learning complicated diamond knowledge, this brand is perfect. It caters to customers who love Tiffany’s classic six-prong design, value reliable lifetime service and have enough budget to pay for brand value and worry-free experience. What Tiffany offers is a complete luxury experience filled with dreams, history and thoughtful service.

In fact, neither brand is absolutely better than the other. Your final choice all depends on your personal values, budget and shopping goals.

Categories
Blue Nile

Resize Blue Nile ring

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details

Lots of people buy diamond rings from Blue Nile. After wearing them for some time, most people find their fingers get thicker. They have to resize their rings later. The resizing process here is totally different from local jewelry shops. Local physical stores do not need any online steps to fix ring sizes. Below I sort out full guides and different choices for you to refer to.

Main Official Way: Use Blue Nile’s own after-sale resize service

Blue Nile has official ring resizing service for buyers. But you must send your ring back to the United States for fixing. This is their standard rule for all customers.

How long will resizing take?

We tell all buyers to prepare a time window of two to three weeks for the full resize work. Do not plan any short-time wearing plans during this period.

What resize rules do they have for buyers?

Every buyer can get one free ring resize within one year after purchase. There are two ring styles they can not adjust size for. Eternity bands and tension rings can not be cut or stretched. Workers have to make a brand new ring from zero if you want to change its size.

Blue Nile provide free shipping label for you to send rings back to their US factory. Once resize finish, they send your ring back with free 2-day FedEx delivery.

One important point many people miss: international buyers need pay 50 US dollars for return shipping fee. This money can not be waived for oversea customers.

Step-by-step operation guide

  1. Talk to customer service staff firstOpen Blue Nile official website, click “Contact Us” button on page. You can also use online live chat box to connect service workers.Tell them clearly that you need ring resize service, and hand over your full order number they gave you when you bought the ring. Without order number, they can not pull out your ring record fast.
  2. Get price quote and shipping arrangementService team will check your ring information one by one. They look at ring metal material, side small stones, ring shape and other details. Then they send you a clear quote of resize cost.Workers will teach you every step to pack and ship the ring safely to their fixed US warehouse address. In most cases, they send a pre-paid shipping sticker to your email directly. You just print it and stick on your parcel box.
  3. Ship out your ring and wait for resize workUse thick bubble wrap and hard small box to cover your diamond ring well. Drop off the parcel at appointed courier store.Blue Nile’s professional jewelry craftsmen will do cutting, stretching, polishing and stone re-setting work to adjust your ring size.
  4. Receive your fixed ring back homeOnce all resize work pass quality check, Blue Nile pack your ring with gift box and send it back to your address.
Resize Blue Nile ring

Critical warning for buyers from Taiwan

You will face customs charge two times in full process. First customs check when you send ring from Taiwan to US, second customs clearance when US send fixed ring back to you.

Before you mail the ring out, you must chat with Blue Nile service to confirm correct goods value declaration words. Wrong declaration content will lead to double tax fees, which waste your extra money.

Pros and cons of official factory resize

Good sides: All resize work done by original factory craftsmen. The finish quality and stone safety get the best protection. No risk of bad re-polish or loose small stones.

Bad sides: It takes really long time. The whole back-and-forth shipping plus fixing work may take several weeks or even one whole month. International delivery also have hidden risks, such as parcel lost, broken package, unexpected customs tax.

Better local choice: Find trusted jewelry repair studios in Taiwan, Hong Kong and Macau

For customers live in Taiwan, Hong Kong or Macau, local resize service is normally much faster, easier to operate, and total spending can be lower than sending ring to US. This choice fit most oversea Blue Nile buyers better.

How to pick a reliable local jewelry shop

You can search offline physical jewelry stores or professional jewelry repair workshops around your living area. Many jewelry counters inside big department stores also take paid ring resize orders.

Search keywords like jewelry repair, ring resize on internet browsing tools. Read real buyer reviews under each shop page to judge their service reputation. Avoid shops with lots of bad feedback about stone falling after resize.

On-site ring check with master craftsmen

Bring your Blue Nile diamond ring to the shop and let master look at it face to face. The master will tell you three key points clearly:

First, can this ring be resized successfully? Not every ring design support easy size change. For examples:

  1. Rings fully set with small side diamonds: Craftsmen have to take all tiny stones out before cutting ring band. This action bring high risk of stone crack or lost during operation.
  2. Tension setting rings and special craft bands: These structure can not stretch or cut, local masters can not adjust size for them too.Second, ring metal type. Platinum and K gold rings have mature resize craft, masters handle these two materials smoothly with little damage risk.Third, time cost and service charge. Most local shops finish resize work within several days. All fees are told to you in advance, no hidden extra money later.

Strong advantages of local resize plan

  1. Save huge time: No cross-border shipping between two countries. You get your ring back in short waiting days.
  2. Less troublesome steps: No customs paper work, no international shipping insurance problem, no unexpected tax fines. All complex overseas delivery troubles gone.
  3. Smooth communication: You talk with ring master in person directly. You can show your exact demand, ask about craft details any time on spot.

Final important summary and practical suggestions

  1. Contact Blue Nile customer service at first no matter which resize way you choose. Tell service your ring resize need in advance. Sometimes the brand can offer partial cost subsidy for your repair, or give most professional advice match your ring style. Do not skip this step easily.
  2. Local resize should be your top choice. For most buyers from Hong Kong, Macau and Taiwan, sending ring to nearby trusted jewelry studio is the most sensible and highest efficiency solution.
  3. Check your ring design before any action. Look if your ring has dense paved small diamonds all over band. Dense stone layout will raise resize difficulty and push up service price a lot. This detail decide if local master can take your order.
  4. Keep all related paper records well. If you pick official US service, save shipping slips, chat screenshot with service team. If you use local shop repair, keep repair order receipt and all message records with master. These papers help you solve dispute once bad situation happen.

Last ultimate advice

If you care about convenient operation and fast progress most, just find a well-comment local jewelry repair shop in Taiwan, Hong Kong or Macau. Bring your ring for on-site check and resize service directly. This is the top solution to solve Blue Nile ring size trouble for regional buyers.

Categories
Others

Diamond Inclusions: Cavity

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details

Does your diamond’s GIA certificate mark a cavity? Do you know what this kind of inclusion is? The word cavity means hole in English. Most cavities form when other surface flaws like knots or crystals fall off after the diamond gets hit. A small number of cavities also come from broken feathers, which create sharp openings on the stone. It looks just like a tooth with cavities. The bigger the cavity is, the worse the diamond looks visually. For this reason, we do not suggest buying any diamond that has a cavity inclusion.

Gem experts have studied this issue for years, and they find cavities can appear anywhere on a diamond. Some buyers think diamonds with cavities on the girdle or edges are okay to buy. They believe the prongs of the ring setting will cover the cavity after mounting, so no one will notice the flaw. This idea sound reasonable, but it has hidden risks. As you wear the diamond longer, accidental knocks can make the edge cavity bigger and bigger. It will finally lower the overall quality of the stone.

Diamonds with cavities on the table are even less recommended. A large hole on the top surface will directly hurt the diamond’s fire and brilliance. Diamonds have a nature to attract oil and repel water. When you wear it daily, cosmetics and oily substances will stick to the stone easily. These oils catch dust very fast. Over time, dirt builds up inside the cavity, and it will look like a dark spot. This dark mark seriously ruins the diamond’s sparkle.

Recently, one follower send me two diamonds and ask me to help choose between them. I checked their GIA certificates carefully and found both stones have cavity inclusions. So I told this person to look for other options instead. There are countless diamonds on the market. If you compare more choices, you will definitely find a much better one without such obvious flaws.

Categories
Others

Styles of Blue Nile Diamond Rings

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details
Diamond rings stand for love. They are a vital part of wedding ceremonies. Picking a right diamond matters a lot, yet the band design also carries huge weight. A ring band does not only hold the diamond in place, it also shows the wearer’s unique personality and charm. Many buyers wonder, what are the common diamond ring styles sold at Blue Nile?

Simple Prong Styles: Six-prong & Four-prong

Simple designs create timeless classics. Six-prong and four-prong diamond ring styles have existed for hundreds of years. The iconic six-prong design has a history of nearly one hundred years. It is everlasting, minimal and can stand the test of time. The most famous examples include Tiffany’s classic six-prong ring, Cartier’s iconic four-prong bullhead style, and the HW ring from Harry Winston. Blue Nile also provides a wide range of six-prong and four-prong band options, and they look really nice when worn. Two typical choices are Petite Hidden Halo Solitaire and Classic Six-Prong Solitaire.
Petite Three Round Diamond Accents Side Stone Engagement Ring In 14K Yellow Gold By James Allen

Bands With Side Pave Diamonds

If you think a plain band looks empty and lack decorations, you can add small side diamonds. The whole ring will then shine brightly, just like many little stars surrounding a bright full moon. Blue Nile has lots of choices in this category, such as Scalloped Pavé Diamond Engagement Ring and French Pavé Diamond Engagement Ring in Platinum (1/4 ct. tw). Some customers say this style catch eyes much easier than plain single stone rings. Small diamonds along the band add soft sparkles when hands move.

Halo Cluster Setting Styles

Do you want your main diamond to looks bigger and more outstanding? Or you hope your ring delivers a luxurious vibe? Then cluster halo styles will be your great pick. These designs are gorgeous without being too flashy. Lots of tiny surrounding diamonds wrap around the center stone, and this craft ask for high standard in stone setting. Blue Nile offers multiple halo cluster rings, including French Pavé Diamond Halo Engagement Ring in Platinum (1/2 ct. tw) and Blue Nile Studio Heiress Halo Diamond Engagement Ring in Platinum (3/8 ct. tw). The layered small stones reflect light from all angles, which greatly improve the visual size of center diamond. Many people on review sites say this is the best budget way to get a big-looking ring without buying an expensive large main stone.
French Pavé Diamond Halo Engagement Ring in Platinum

Bands With Colored Gemstones

Lots of customers choose bands set with other gemstones mainly to show their personal taste. Rubies and sapphires paired with white diamonds create a extra luxurious and beautiful effect. The contrast between colorful stones and clear diamonds makes the ring one-of-a-kind. One representative item at Blue Nile is Round Blue Sapphire Three Stone Engagement Ring In Platinum By James Allen. These colored stone styles fit people who dislike plain all-diamond designs. Weddings with vintage or romantic themes match these rings perfectly.
Round Blue Sapphire Three Stone Engagement Ring In Platinum By James Allen
Side note: Many buyers feel confused and ask why some ring bands on Blue Nile belong to James Allen. The reason is that Blue Nile and James Allen merged together in the first half year of 2026. Their design resources and product lines are fully combined now, so shoppers can find James Allen exclusive styles directly on Blue Nile’s official website. The merge also bring more design choices for customers, and the price policy keep steady without sharp rises.

Fancy Shaped Diamond Rings

Classic Pear Shaped Diamond Engagement Ring in Platinum
Nowadays, more and more people fall in love with fancy cut diamonds. Fancy diamonds do not have the neat balanced proportion of round brilliant diamonds, so most fancy diamond rings need custom mold making during production. If you chase unique look and hate wearing the same ring as everyone else, fancy shaped diamond styles suit you well. Blue Nile stocks many related products, like Petite Three Round Diamond Accents Side Stone Engagement Ring In 14K Yellow Gold By James Allen, Classic Pear Shaped Diamond Engagement Ring in Platinum (1/2 ct. tw), and Pavé Diamond Halo Engagement Ring In 14K Yellow Gold (Oval) By James Allen. Oval, pear, emerald and cushion cuts are all available. Each shape carry different meanings, pear shapes stand for pure love while oval shapes symbolize lasting happiness. Custom sizes and metal material swaps are also supported for these fancy cut rings.
Categories
Diamond 101 Others

What is the price of a one carat diamond?

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details

What is the price of a one carat diamond?

When people hear the word diamond, they will easily think of wealthy ladies and socialites wearing big diamonds with many carats. Many people also wonder, how much does a one-carat diamond cost exactly?
First of all, let’s talk about carat. Carat is the standard weight unit for all kinds of gemstones and jewelry. One carat equals 0.2 grams, which is one fifth of a gram. To make it easier for people to tell the size of small diamonds, people divide one full carat into 100 points. That means a 50-point diamond is just 0.5 carats, and a 100-point diamond is exactly one carat. This counting way is widely used in the diamond market every day.
Now back to the main question: how much is a 1-carat diamond?
The price of a diamond is mainly decided by the famous 4C grading system. For diamonds with the same carat weight, their prices can be totally different because of different color, clarity, cut, symmetry and polish grades. Besides these basic factors, some extra features also change the price a lot. For example, diamonds with or without fluorescence will have big price gaps. Some diamonds have natural flaws like milky tint, coffee tint or green tint, and these problems will also make the price go down. So there is no single fixed answer to the price of one carat diamond.
A low-quality 1-carat diamond may cost around 3000 US dollar. If the diamond has good overall quality, its price can reach tens of thousands of US dollars. When it comes to high-quality colored diamonds, the price is even more amazing. A nice colored diamond can cost hundreds of thousands or even millions of US dollars.
Brand is another factor that affects diamond prices. Luxury brands sell their diamonds at a much higher price than regular diamond sellers. Most of the extra money here is just the brand premium, not the real value of the diamond itself. If you want to buy a cost-effective diamond ring, custom diamond rings are a great choice. There are many reliable online stores in this field. Bluenile, Jameallen, Whiteflash and Rarecarat all have good reputations among buyers. Jameallen has now merged into Bluenile and become part of Bluenile’s product line.
To sum up, the higher the color and clarity grades are, the more expensive the diamond will be. Never judge a diamond’s value only by its carat size. A diamond’s final price is affected by many different parameters together. When you plan to buy a diamond, you need to take all these factors into consideration carefully.
Categories
Others

Guide to GIA Diamond Certificates

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details
GIA is short for the Gemological Institute of America. It is a non-profit jewelry appraisal organization based in the United States. Founded in 1931, it has developed for more than 80 years. Now it has set up many branches around the world, and it has become the benchmark for diamond grading. Many people come into contact with GIA diamond certificates for the first time, and they do not know what the items on the certificate stand for. Today we will make a clear explaination about the GIA diamond certificate.

Understanding GIA Diamond Certificates

GIA has two main types of diamond certificates: full certificate and small certificate. The full certificate is used for colored diamonds and large carat diamonds. The small certificate is applied to diamonds weighing less than one carat. The biggest difference between them is that the full certificate prints a diagram showing the distribution of inclusions inside the diamond, and its size is also larger. Every diamond has unique inclusions in different shapes and positions, so this diagram can well prove that each diamond is one of a kind. We take round diamonds as an example to explain the details of the certificate. One important point you need to know: GIA will not give cut grades for fancy shaped diamonds.

GIA Diamond Certificate

The left side of the certificate lists key information from top to bottom.

Issue Date: September 01, 2017

GIA Report Number: 6265698118

Shape and Cutting Style: Round Brilliant

Measurements: 5.41 – 5.43 x 3.33 mm

Carat Weight: 0.60 carat

Color Grade: H

Clarity Grade: VS1

Cut Grade: Excellent

Polish: Excellent

Symmetry: Excellent

Fluorescence: None

Clarity Characteristics: Needle, Pinpoint

On the right part of the certificate, you can also see the same GIA report number. This number matches the laser engraving on the diamond’s girdle. There is also a proportion diagram of diamond cutting parameters, grading notes and anti-counterfeit codes. A QR code is attached here too. You can scan the code or visit the official GIA website to check all detailed information of this diamond.
Categories
Blue Nile James Allen

James Allen & Blue Nile Hong Kong Self-Pickup Purchase Guide & Process

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details
Latest update: James Allen is now a official collection under Blue Nile. When you buy diamonds from James Allen, it is the same as shopping on Blue Nile. Hong Kong buyers can customize diamonds online, enjoy flexible payments and pickup in Hong Kong.
James Allen has teamed up with Signet, the largest offline jewelry retailer across America. Together, they form the biggest jewelry retail company in the United States. Customers love their great shopping experience and strict diamond quality control. More and more people in Hong Kong choose James Allen to customize their engagement jewelry. So what is the complete guide for buying and self-picking James Allen diamonds in Hong Kong? Let’s take a look.

》》》》Click here to learn how to pick the perfect diamond《《《

》Learn about supported payment methods and tips to get better deals on diamonds《

First, open the official Blue Nile website. You can find James Allen collections on pages like earrings, pendant and diamonds. On the top navigation bar, open the drop-down menu of engagement rings. You will see two choices: start with a diamond and start with a setting. If you want to customize a diamond ring, you can pick the diamond first, or choose the ring setting first. Besides, you can also customize jewelry with colored gemstones or fancy color diamonds.
Let’s start by choosing a diamond. Click start with a diamond, and you will enter the diamond inventory page. You can filter diamonds by shape, carat weight, color, clarity, price and cut grade. You can also select loose diamonds by origin, including high-quality stones from Canada. Go to advanced options for more filters. Here you can set polish, symmetry, fluorescence status, certificate type, table percentage and depth percentage.
blue nile james allen
After you pick your favorite diamond and match it with a nice ring setting, add the items to your shopping cart. Choose the right ring size for your finger. You can also get free inscription with meaningful words inside the ring band. Then proceed to Secure Checkout.
bluenile jamesallen rings
Blue Nile support many flexible payment options. You can use PayPal, or apply for installment plans powered by Splitit. Major credit cards are accepted too, such as VISA, MasterCard, American Express and Discover. Bank wire transfer is also available. Please note that any orders over $1000 at Blue Nile can enjoy an extra 1.5% discount.
james allen bluenile bracelet
Once you find your ideal diamond, click select this diamond. A pop-up window will show three options. You can turn this diamond into a ring or a necklace. If you just want to buy the loose diamond, add it directly to cart. You may also pair the diamond with designer ring settings from James Allen.
ja bluenile collection
All finished diamond jewelry can be delivered to your physical address in Hong Kong. You can also send the parcel to designated self-pickup points. Remember to bring your valid documents when you collect your goods. This can prevent you from making a useless trip.
Categories
Blue Nile

Astor By Blue Nile Replaced by Curated Diamonds with More Diamond Options

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details
Update: In 2026, Blue Nile stop selling Astor Diamonds. They replace it with Curated Diamonds now. Curated Diamonds bring big good for shoppers, it let customer pick their favorite stones without any stress. There are tons of filter options to use, hunting for nice diamonds won’t feel troublesome anymore. All the following text will focus fully on Curated Diamonds, not the old Astor Diamond line.
Every young girls dream to wear a shiny, eye-catching diamond ring one day. But many people meet a weird problem in real shopping. Some diamonds look dull and dim under any light, while others sparkle brightly no matter indoor or outdoor. Lots of buyers confused and ask why this big gap happen. The answer is simple: every natural diamond in the world is one of a kind, no two stones are exactly same. Even if we put aside the famous 4C standard for a second, different cutting and polishing work create huge differences on key proportion data. Those data include table width ratio, total depth ratio, pavilion angle, crown angle and more. All these separate numbers mix together and decide how much light a diamond can reflect back to human eyes. That’s why some gems glow strong and others look flat. A lot of new buyers don’t know the trick, they keep asking how to find a super sparkling diamond within their budget. Blue Nile launch Curated Diamonds, their top-tier ideal diamond collection, back in 2026. The brand pick out stones strictly through layers of checks, to make sure every single Curated Diamond own outstanding light performance. The stock range is very wide, customers can sort and filter stones by any diamond parameter or their spending limit easily.
All Curated Diamonds come with official certification from GIA, full name Gemological Institute of America. Every qualified stone must go through professional testing machine called BrillianceScope. This device test three core optical features of each diamond: Brilliance, Sparkle and Fire. Professional examiners score each part carefully, only stones get top marks in all three items can be labeled as Curated Diamonds. This strict rule make Curated Diamonds far better than regular loose diamonds on light return, colorful fire flashes and bright white shine.
Blue Nile put optical performance as the most important standard for Curated Diamonds, higher than carat weight or raw stone saving rate. When craftsmen cut rough diamond into Curated Diamond finished product, only 26% of the original rough stone can be kept. This low retention rate is the price for perfect cut. Every Curated Diamond reach Excellent grade on three critical cutting standards: cut grade, polish grade and symmetry grade. Workers do precise, handmade cutting process for hours to hit the perfect balance point. People may not know that Brilliance and Fire are two opposite index, when one goes up, the other will drop down. Cutters need to calculate and adjust every tiny angle to find the sweet spot where both brightness and colorful light work well together. Because the standard is so tough, only one out of one thousand natural diamonds can pass all tests and become Curated Diamonds. It’s a really rare selection.
In the early days, Curated Diamonds only have round brilliant cut stones. Now Blue Nile expand the collection with many fancy shapes. Shoppers can find oval, pear, heart, princess, Asscher cut Curated Diamonds and more styles on their website. Every stone in this line pass multi-layer visual screening. When you watch them with naked eyes, there is no milky haze or brown tint inside the crystal. No milk coffee diamonds exist in Curated Diamonds inventory at all.
We have two shopping plans for different budget levels. If you have enough money to spend, Curated Diamonds from Blue Nile will be your perfect choice. You get guaranteed top sparkle, clean crystal and reliable GIA certificate at the same time. If your budget is tight and you don’t want to waste money, you can send us a message anytime. Our professional diamond consultants will search common loose diamonds that share same light effect as Curated Diamonds. These regular stones skip the strict Curated screening, so their price drop a lot without losing shine. This choice bring amazing cost performance for diamond buyers. You can finally take home a bigger diamond with bright, attractive sparkle without overspending your money. Whether you want a ring for engagement, wedding or daily wear, these high-sparkle stones can satisfy all your needs, and you will not feel stressed when picking out your ideal diamond anymore.

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Pear Diamond

All Blue Nile diamonds are worth buying? 1，Both milky tint and brown hue:Tap to see full diamond info 2，The diamond has milkiness:Click to view detailed diamond information 3，The diamond has medium green fluorescence.:View diamond details 4，The diamond has a cavity:See the diamond details
As one of the most popular fancy shaped diamonds, pear shaped diamond is getting more and more popular among jewellery lovers all over the world these years. Lots of people choose it as their engagement stone for two simple reasons. First of all, pear diamonds always look bigger in visual size comparing with round brilliant diamonds with the same carat weight. Second, once you wear a pear diamond ring on your finger, it can stretch your finger line and make your hands look slimmer and more elegant. For a standard one-carat pear diamond, its length can reach around nine millimeters, and its width is about five millimeters, this data is a basic reference for new buyers who do not know much about diamond dimension.
If you take out a pear diamond and watch it carefully under soft light, you will see its special outline clearly. One end of the stone forms a smooth half circle, and the other end tapers down to a thin, sharp point. The whole shape looks just like a drop of water falling from the sky, or a single teardrop roll down from someone’s cheek. That is why many people also call it teardrop diamond in daily talk. Anyone who keep an eye on high fashion fine jewelry must have stepped into the boutique of Chaumet before. The brand’s diamond rings fully show the outstanding sparkle and brilliance of pear shaped stones, and they do it better than most luxury jewellery brands. The rings from their Joséphine Aigrette collection have already become timeless classics that represent a whole fashion era. Countless celebrities and royal families pick this series for their important life moments, and this push pear diamonds to become even more trendy in recent market.
There are many world-famous pear shaped diamonds recorded in jewellery history books, and two of them are the most well-known to the public. The first one is the Cullinan Diamond, which weights more than five hundred carats at its rough state. After professional cutting work, this pear diamond owns seventy-four facets in total. People mount this precious stone on the royal scepter of British monarch, and it still stay there as a priceless national treasure up to today. Another legendary pear diamond is the Taylor-Burton Diamond, with an original weight of 69.42 carats. Its first famous owner was Elizabeth Taylor, a super movie star with huge fame in last century. Later, a man named Robert bought this diamond from the previous holder. He sent the stone back to diamond craftsmen for re-cutting, trimming and polishing to fix its uneven surface and boost its light performance. After the rework process finished, the weight of this pear diamond drop to roughly 68 carats, but its fire and clarity got a huge upgrade.

pear diamond

The Ideal Proportion Range for Perfect Pear Shaped Diamonds

Different from round diamonds, fancy shape diamonds like pear do not receive an official cut grade on standard GIA diamond certificates. Gem lab workers can only sum up years of testing experience and sum out a ideal parameter range for pear stones, to help customers pick well-cut pieces with good light return.
The length-to-width ratio is the most important index for pear diamonds. The perfect range stands between 1.5 and 1.7. Stones inside this interval can release the best fire and brightness when light pass through the facets. If the ratio go above 1.7, the pear diamond will turn too slim and long, the half-circle end will look small and unbalanced. If the ratio fall below 1.5, the stone become too short and compact, lose the elegant teardrop feature that pear diamond famous for.
Other key proportions have fixed suitable ranges too. The table width ratio should stay 56% to 60% of the whole stone width. The total depth ratio need to keep between 59% and 62%. For the girdle thickness, medium thickness is the most friendly choice for daily wear; stones with thin or slightly thick girdle are also acceptable, with or without extra girdle facets both work fine.
I will always suggest every buyer check the real diamond in person before pay the bill. You need to avoid pear diamonds with heavy bow-tie effect. The dark bow tie shadow in the center will block light reflection and make the stone look dim and lifeless. Numbers on the certificate can only tell you basic data, you can not picture the actual shining look of a diamond just by reading those parameters. The online diamond retailer Blue Nile shoot high-definition video for every single diamond they sell on their website. When you feel confused and cannot make a final decision between several stones, you can enter their online zoom room to watch each diamond’s live video, rotate the stone and check its light performance from all angles. This online service greatly lower the risk of buying a unsatisfactory pear diamond without seeing real items offline.