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Others

Fancy-shaped diamonds

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

From the previous article, we learn that diamond quality is mainly affected by the 4Cs, including clarity, cut grade, carat weight and color grade. Among these four factors, cut is regarded as the most important one to decide a diamond’s quality. This conclusion is mainly for round brilliant diamonds, and it does not apply to fancy color diamonds and fancy shaped diamonds.
Nowadays, people pursue more personalized styles, so round diamonds are no longer the only choice. Round diamonds take up about 75 percent of total diamond sales, and the rest market is occupied by fancy shapes. You may wonder what common fancy diamond shapes there are. They include marquise, oval, heart, pear, princess, emerald, triangle, cushion, radiant and asscher cuts.
Most people are familiar with round diamonds. A standard round diamond has 58 facets, while some are designed with 66 or 81 facets. Exquisite cutting skills and perfect symmetry can fully show the brilliant sparkle of a diamond. As for fancy shaped diamonds, you can roughly imagine their looks just from their names. Here is a simple introduction to each classic shape.
The marquise diamond gets its name for its eye-like shape. It is wider in the middle and narrow at both ends. This shape can gather light entering the stone well, so it has nice fire. Besides, it makes good use of the diamond’s weight, so a marquise diamond always looks larger than its actual carat.
Oval diamond is another popular shape. The best length-to-width ratio is 1.5 to 1. It is a great choice for ladies with small or short fingers, as it can make fingers look slimmer. In Western countries, it is favored by people who are creative and have unique tastes.

Fancy-shaped diamonds

Heart shaped diamonds first appeared in ancient India. A standard heart diamond has 63 facets. Its ideal depth ratio is between 59% and 63%, with a 1:1 length-width ratio. Cutting a heart diamond requires extremely high skills from craftsmen.
Pear diamond looks just like a pear, and people also call it teardrop diamond. If you look carefully, you will find it combines the features of marquise and oval cuts. It is widely used for earrings and suits young ladies with a delicate figure.
Princess cut is very common too. It looks like a square covered with many facets, and it normally has 57 to 58 facets. This shape matches ladies who have steady and elegant temperaments.
Emerald cut diamond is in a rectangular form with cut corners, just like a stepped ladder. It can keep more weight from the rough stone. Its ideal length-width ratio ranges from 1.3 to 1.4. Even though it is not as shiny as round diamonds, its pavilion can create special light effects that other shapes cannot match.
Radiant cut is a square or rectangular diamond. It mixes the cutting styles of emerald and round brilliant, so people name it radiant brilliant cut. It is popular among fashion lovers.
Triangular cut diamonds are usually made from flat rough stones. A standard triangle diamond keeps a 1:1 ratio, which helps it gain better brilliance.
When talking about Asscher cut diamonds, many people will think of Queen Elizabeth, who loved wearing this style a lot. Many people mix up Asscher cut and emerald cut. The biggest difference is that Asscher cut is square shaped.
Cushion cut has a classic and vintage style. It owns the advantages of both princess cut and round cut. It is often matched with small accent diamonds to make luxurious jewelry designs.

Why cut diamonds into fancy shapes?

Before cutting a rough diamond, jewelry analysts need to do detailed research. They mainly focus on two key points: getting the highest return on investment and ensuring good sales volume. Careful analysis before cutting is the key to maximum profits. Analysts also need to take other factors into consideration, such as color retention, weight retention, the original shape of the rough stone and the position of inclusions.
There is a famous saying that diamonds are a girl’s best friend. Everyone wants to buy a high-quality diamond at a reasonable price, so it is wise to pick diamonds with Excellent cut grade. James Allen has now merged with Blue Nile. These two brands own a huge inventory of loose diamonds and update the information all the time. If you take time to select carefully, you will definitely find your ideal fancy shaped diamond.

regular shaped diamonds

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Others

Dimensions of loose 0.7 carat diamond

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

I found out recently there are way more customers come to ask about diamonds at around 0.7 carat. Many people got one big question in mind. How big is a 0.7 carat diamond actually? If we set it with a setting that make the stone look bigger, can it show the visual effect same as a one carat diamond ring? Almost everyone who know a little about jewelry know this truth. For diamonds with identical color, clarity and cut grades, a 1 carat diamond cost far more expensive than a 0.7 carat one. The main reason is the carat premium in diamond market. Then here come another doubt. Is a 0.7 carat stone much smaller than one full carat in real sight? Let us take a look at a diamond size comparison picture I prepared below.

Dimensions of loose 0.7 carat diamond

We can clearly tell from that picture. Under ideal perfect cut standard, a 0.7 carat round brilliant diamond has a surface diameter of 5.8 millimeters. On the other side, a standard 1 carat round diamond reach 6.5 millimeters across its top face. The physical gap between these two sizes is really tiny, almost hard to notice with bare eyes. But if you match your 0.7 carat center stone with a well-designed halo or wide open setting which enlarge the stone visually, the whole ring might even looks larger than an original 1 carat diamond ring when people glance at it casually. Just like full one carat diamonds, most qualified 0.7 carat stones will come with international authoritative certificates such as GIA report. Every certified diamond has a unique matching GIA certificate number laser engraved on its girdle edge, so buyers can check the stone identity easily later.
Lots of shoppers have shared same experience with me many times. They walk into some local jewelry store and spot a 0.7 carat diamond there. The store used a simple six-prong mounting for it. Strangely enough, that diamond ring look visibly bigger than the 1 carat rings placed next to it on the display counter. Most buyers will get excited right away when they see such scene. They think they found a super good bargain with huge value. They start wonder should they pay the bill and take the ring home without second thought. Here Ijadiamond give all buyers an important warning, you better stay away from those tricky diamond rings without careful inspection first. Some dishonest merchants use low-quality cut diamonds to cheat ordinary customers, and sell them at high price same as well-cut stones. Those bad-cut 0.7 carat diamonds have an abnormal wide diameter much bigger than official standard data, but their total carat weight still stay fixed at 0.7 carat. To gain a wider table surface, the diamond cutter will make the stone’s pavilion depth extremely shallow. This type of poor cut grade diamond will totally ruin the stone’s light performance and fire. The overall outline of such diamonds just like a flying saucer. People in trade also name them flying saucer diamonds. Do not rush to make purchase decision in such situation. You will lose more money than you save in the end, and the ring will look dull and lifeless forever.

How much money do people need to spend on a 0.7 carat diamond?

Four C standards are the core factors that control all diamond pricing. The four C items include carat weight, color grade, clarity grade and cut grade. If color, clarity or cut grade shift even slightly, the total price of a 0.7 carat diamond can create a massive price gap between different stones. Right now, people can search for 4,349 perfectly cut round 0.7 carat diamonds on the Blue Nile official website. Their price range fall between 11,000 Hong Kong Dollars and 46,800 Hong Kong Dollars. On James Allen’s online platform, there are around 2,956 ideal cut round 0.7 carat diamonds available for selection. Their price start from 10,200 Hong Kong Dollars up to 45,900 Hong Kong Dollars. Online diamond retailers have much lower running cost compare to offline physical jewelry shops. Physical stores need to cover monthly store rent, employee salary, in-store display maintenance and many other daily overhead expenses. Without those heavy extra cost burdens, online diamond shops can offer much friendlier and cheaper price tags for same quality diamonds to all buyers.
Categories
Diamond Q&A

Blue Nile 1ct Diamond Selection & 4-Prong Ring Setting Consultation

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Inquirer: Hello, your advice has been extremely helpful. I have a budget of no more than 60,000 Hong Kong Dollars, and I intend to purchase a 1-carat diamond from Blue Nile. My requirements for the stone are VS1 or VS2 clarity, G color or higher, and an excellent cut. I hope to pair it with a four-prong setting that maximizes the diamond’s visual size. Could you offer some suitable recommendations? Thank you very much.
Ijadiamond: Greetings. The following diamonds deliver outstanding value for money among stones with identical grading standards:
  1. Item No. 08722066
  2. Item No. 08705986
  3. Item No. 08656338
  4. Item No. 08452205
  5. Item No. 08739577
My top pick is the fifth stone. It boasts the finest cut and superior clarity grade. No prominent blemishes can be observed on its table facet under a 10x magnifying loupe, making it the most cost-effective option out of the five.
As for ring settings, you may consider style 197889. There is an alternative design, model 256699, which features slimmer shanks. Nevertheless, I would strongly suggest the first one. Crafted in 14k gold, it offers greater structural durability and better cost performance overall.
Inquirer: When it comes to wedding ring metal, which is the better choice, 18k gold or platinum?
Ijadiamond: Each metal carries distinct advantages. Platinum is marginally softer, rarer, and priced higher, while delivering a smoother, more comfortable wearing experience. In contrast, 18k gold provides firmer stone retention for diamond mounting. The vast majority of our diamond ring settings are made from 18k gold, with 14k designs only available in limited styles.
Inquirer: Why is diamond 08656338 priced significantly lower than the rest? Between diamond clarity and color, which factor holds greater priority?
Ijadiamond: Its GIA certificate records crystal inclusions on the stone’s table facet. It remains uncertain whether these flaws are visible to the naked eye upon physical inspection; visible eye-blemishes directly reduce the diamond’s market value. Clarity exerts a far larger impact on diamond pricing, while a G color grade is already a premium, visually neutral shade.
Inquirer: Please help me source an 18k gold four-prong setting instead. I want both thin prongs and a slim band. My partner has a delicate finger size 11, and my budget for the setting is capped at 6,000 Hong Kong Dollars.
Ijadiamond: Among our 18k gold ring mounts, style 57196 is an excellent match. It has a high-profile build that amplifies the diamond’s apparent size, with a small sapphire embedded beneath the stone as a unique, trendy decorative detail.

sapphire diamond ring blue nile

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Blue Nile

Blue Nile 邮寄中国内地大陆优惠码使用办法

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Blue Nile 是美国最大的网络钻石提供商,世界各地的钻石可以被源源不断的展示在这里,从香港等地方购买是可以获得额外优惠的,获得优惠的办法是先切换到bluenile香港站,输入优惠码获得优惠,(切记不要提交订单),右上角国旗处切换回bluenile内地中国大陆站,看一下,优惠码是不是被激活了,然后提交订单,就可以享受blue nile购物的乐趣了。

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Brian Gavin Diamond

92% Off Brian Gavin Signature Diamonds for Memorial Day

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Brian Gavin Diamonds sit in Houston, Texas. This store is super famous for their amazing diamond cuts. The Signature Diamond they sell are all picked out by Brian Gavin himself. He is a top well-known diamond expert in the industry.
Memorial Day of the United States is coming soon. This holiday is to honor all fallen soldiers who lost their lives for the country. To show respect to these heroes, Brian Gavin Diamonds roll out special discount codes. These codes work on select high-grade loose diamonds and many other fine jewelry pieces. One thing customers have to keep in mind: this offer only last a very short time. If you plan to buy top quality diamonds recently, you should not miss out this rare chance.
There are two different discount offers split for two kinds of goods, and they use separate promo codes. Let’s talk about the deal for VIP subscribers first. Anyone who sign up as Brian Gavin Diamond’s VIP member can get 8 percent off all Signature Diamonds. That means you pay only 92 percent of the original price.

brian gavin diamonds

You just type the code MEMDAY1708 when you check out online to lock this price cut. This discount code will stop working on May 30, 2017. The store gives a extra 3% price reduction for wire transfer and check payments. This 3% deal can stack together with the Memorial Day coupon. So buyers get a total 8% savings in total.
This coupon code MEMDAY1708 fit most of the Brian Gavin Signature lines. It covers eight hearts and eight arrows cut stones, cushion cut diamonds, princess cut stones and blue diamond jewelry items. But there is a clear limit here. Customers can not use this discount on the Black by Brian Gavin product line at all. No exceptions for this series.
The second discount is made for finished wedding jewelry, like wedding rings and matching bridal sets. Shoppers can grab a maximum 10 percent discount here, so the price becomes 90% of the tag price. Enter MEMDAY1710 at checkout page to claim this discount right away.
There is a strict payment rule for anyone paying via bank check or wire transfer. All money have to arrive the store’s account before June 2. If the funds come later than this deadline, the store will cancel the discount automatically, and all diamonds and wedding jewelry will switch back to full original retail price.
Many people want to buy diamond rings but do not have enough budget at once these days. The brand solve this problem with flexible monthly payment plans. Customers can choose three different time lengths to finish their payment: 3 months, 6 months or 12 month long installments. It helps a lot for young couples preparing for weddings.

Quick code reminder

Brian Gavin Signature Diamonds 8% off code: MEMDAY1708

Finished wedding rings & bands 10% off code: MEMDAY1710

Offer end time: Tuesday, May 30, 2017, 5 o’clock PM, Central Time USA
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Others

5 Ways to Enlarge Diamond Visual Effect

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Everyone wants to spend the least money to buy the biggest diamond possible. But what can you do to make your diamond look larger and more prominent when you only have a tight budget? Today, James Allen, a famous online custom ring website, which merged into Blue Nile back in 2026, share five practical tricks to make any diamond appear bigger. If you haven’t customized your diamond ring yet, you should read and learn these useful tips right now.
Trick one works best if you have not picked your main stone yet and plan to get a fancy shaped diamond. You can pick thin and elongated diamond cuts, such as marquise, pear and emerald diamonds. When they hold the same carat weight, they always looks much bigger than standard round brilliant diamonds to naked eyes. If round diamonds are your top pick, you better choose stones with ideal perfect cutting work. Cut is one of the four most important C’s of diamonds, and the quality of cutting decide how sparkly a diamond can be. Well-cut stones can reflect more light inside and out, release bright colorful fire flashes all over the surface. This extra shine create a visual trick that make your diamond seem larger and brighter at first glance. Many new buyers ignore cutting grades, and they end up with dull small-looking stones even with decent carat weight, so this step is really not something you can skip easily.
Trick two focus on your ring setting after you have already chosen your main diamond. You should go for halo custom ring designs. Small side accent stones around the center stone create a strong contrast effect that enlarge the whole look of your diamond ring. A classic halo style looks just like a sunflower with countless tiny stones around the core, it glows with endless shining light wherever you move your hand. Even a thin simple halo band without heavy metal frames can lift up the visual size of your main stone a lot, many jewelry sellers recommend halo settings for clients with limited spending budget for this exact reason.

5 Ways to Enlarge Diamond Visual Effect

Trick three tells you to pick white silver-toned metal for your whole ring band, like 18k white gold or pure platinum metal. Silver white metals act like small mirrors under and around your diamond, they bounce light straight back onto the main stone and visually stretch its outline to look bigger. Some people love warm metal tones like rose gold or yellow gold though, and there is a easy fix for this preference. You can keep the main band rose or yellow gold, but make all the stone prongs that hold your center diamond white silver colored. The white prongs frame the diamond clearly, stop warm metal tones from covering its shine, and keep the stone large and glowing all the time.

5 ways to Make Your Diamond Ring Look LargerTrick four is about your band width and extra side stones. Narrow thin band shanks are a great choice, or you can add a few tiny accent stones spread along the ring band. The slim metal part take less space on your finger, it will not compete for attention with your main diamond. When the thin band and small side stones work together to set off the center stone, they match perfectly and make your diamond stand out way more on your hand. People’s eyes will fall straight onto your main gem instead of the band, so the diamond naturally looks bigger and more eye-catching to anyone who sees it.

Make Your Diamond Ring Look Larger

Trick five suggest you pick ring designs with wide, eye-catching overall settings. Popular choices include snowflake style rings and Cartier’s classic bullhead ring designs. The large detailed metal frames around the center stone draw people’s sight directly to your diamond and add extra volume to the whole ring. Nowadays, custom made diamond rings become really easy to order online or in local jewelry shops. You can design one-of-a-kind rings fully based on your own likes, budget and hand shape. Both ready-made large setting styles and fully personalized custom rings are wonderful options if you want your diamond to show a bigger visual effect without paying extra money for higher carat weight stones.
Lots of ring shoppers waste money buying heavier carat diamonds without knowing these five simple tips. With clever choices on diamond shape, cut, metal tone, band width and ring setting style, you can own a diamond ring that looks far larger than its real carat size, without breaking your original budget. These easy tricks do not require complex professional knowledge, anyone who plans to buy custom diamond jewelry can put them into practice when shopping for their ideal engagement or daily wear diamond ring.
Categories
Diamond Q&A

預算15000 HKD 鑽石挑選推薦

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

諮詢者: 您好,是這樣的,因為準備買鑽戒,我已經學習了相關的一些4C知識和GIA的相關參數的基礎知識,並且在Blue Nile也看了很多鑽石,現在已經感覺眼花繚亂了,我怕選到有明顯瑕疵,不閃的鑽石。另外最大的風險是怕買到奶鑽咖鑽,畢竟在Bluenile的篩選參數中不能看到這些數據,我也不太懂石頭的GIA證書具體怎麼分析,你可不可以幫我做下選擇,挑出性價比比較好的裸石,我需要鑽石挑選的專業建議,謝謝。

Ijadiamond: 你好,關於奶鑽咖鑽和肉眼有無可見瑕疵這些依據證書參數是看不到的,因為鑽石畢竟不在我們眼前,Bluenile不像james allen一樣為每一顆鑽石提供40倍放大錄像,所以要先依據參數選好比較好的鑽石後,再提交給bluenile客服檢測有無奶咖綠等問題的。

諮詢者: 好的,我的預算是15000 HKD左右,能否幫我挑選一顆0.6克拉,淨度VS2以上,各方面檯面深度等參數比較好的裸鑽,再次感謝。

Ijadiamond: 請看這一顆鑽石 淨度是VS1的,其他參數也都很棒。https://www.bluenile.com/hk/diamond-details/LD08522774,另外這一顆也很不錯  https://www.bluenile.com/hk/diamond-details/LD08377103

這個SI1淨度的 看實物是肉眼無暇的,車工也很好。 https://www.jamesallen.com/loose-diamonds/round-cut/0.66-carat-h-color-si1-clarity-excellent-cut-sku-2534596

諮詢者:  謝謝,這一顆鑽石怎麼樣呢?我看著也挺不錯的 https://www.bluenile.com/hk/diamond-details/LD08727381

Ijadiamond: 是的,這個裸鑽各方面也挺好,顏色等級高,但是價格稍微高一點。

諮詢者: 好的,我會在這幾顆裡面選一個。

Ijadiamond: 期待你的鑽戒照片

Categories
Blue Nile Diamond Recommend

Affordable 0.7ct Premium Diamonds Picks from Blue Nile 2026

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Blue Nile ranks among the world’s largest loose diamond suppliers. After its full merger with James Allen in 2026, the platform has expanded its diamond inventory and lifted overall stone quality standards. It stocks countless polished diamonds sourced from global cutting workshops. If you browse patiently, you can easily find plenty of cost-effective loose stones with reliable quality. Today I will share three premium curated diamonds ideal for buyers ready to place orders.

0.70ct D VVS2 3EX Non-Fluorescent Curated Loose Diamond

The Curated Diamond series lets buyers view multi-angle real photos of every single stone. This diamond boasts top-tier color and clarity grades paired with flawless cutting performance. It comes with a formal GIA certificate, issued by the most authoritative gemstone grading lab worldwide, which fully guarantees its authenticity and quality.

Diamond link:

https://www.bluenile.com/hk/zh/diamond-details/LD08398304

0.74ct E VVS2 3EX Non-Fluorescent Curated Loose Diamond

This 0.74-carat diamond features outstanding overall parameters, comparable to the discontinued Astor diamonds from Blue Nile’s old premium line. For reference, Astor diamonds with identical grading standards used to cost twice as much as this option. It is a perfect pick for shoppers with strict standards for diamond color and clarity.

Diamond link:

https://www.bluenile.com/hk/zh/diamond-details/LD08110305

0.72ct E VVS1 3EX Non-Fluorescent Curated Loose Diamond

This 0.72-carat stone has even superior clarity at VVS1 grade, higher than the two diamonds mentioned above. Its official video footage shows crisp, flawless hearts and arrows pattern, alongside brilliant fire and light sparkle. It stands out for customers chasing ultra-clean clarity and exceptional light performance.

Diamond link:

https://www.bluenile.com/hk/zh/diamond-details/LD08398305

All three curated diamonds adopt perfect 3EX cut and carry zero fluorescence, avoiding the dull, hazy glow caused by strong fluorescence. Thanks to Blue Nile’s integrated supply chain after merging with James Allen, these premium stones are priced far more reasonably than comparable high-end diamonds sold separately elsewhere. If you plan to customize an engagement ring with a high-grade loose diamond, these three options are well worth your consideration.

bluenile 鑽石

Categories
Diamond Q&A

Tips for Purchasing Blue Nile Round Diamond Within 1500 USD Budget

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Inquirer: Hello, I’m planning to buy a loose round diamond from Blue Nile, and my budget is around 1,500 US dollars. I’m a total beginner with zero professional knowledge about diamonds, so I have no idea how to strike a proper balance among the four core diamond grading criteria, the 4Cs. One clear priority I have is that the diamond should not show an obvious yellow tint to the naked eye. I’d really appreciate it if you could offer me some targeted purchasing advice based on my limited budget and basic demand. Thank you so much in advance for your guidance.

Ijadiamond: Hi there, I’d recommend H color diamonds for you as they deliver outstanding cost performance with barely noticeable yellow undertones. When viewed with the naked eye, their visual appearance matches perfectly with H-color diamonds displayed in physical jewelry malls. You can visit offline jewelry stores to examine real H-color diamonds in person to help yourself decide whether this shade fits your aesthetic preference. As the old saying goes, scarcity boosts value; diamonds grow rarer as their carat weight increases. With your 1,500-dollar budget, you can afford a 0.70-carat diamond graded VVS in clarity, which will be completely eye-clean without any visible blemishes to ordinary observers.

I’ve shortlisted two round loose diamonds with superior cut quality and great value for money for your reference. Blue Nile provides highly detailed, crystal-clear real-shot videos and images of each loose diamond on its official website, which you can carefully review to inspect surface details. Before placing any order, remember to double-check whether the stone is fully eye-clean. You should also confirm it is free of milky or brown tint defects, commonly known as milk diamonds and coffee diamonds, which severely ruin a diamond’s sparkle and transparency. The two diamond links I mentioned are https://www.bluenile.com/hk/zh/diamond-details/LD08502199 and GIA 0.71 Carat H-VVS2 Excellent Cut Round Diamondrespectively. Unfortunately, the second link leads to an anti-bot verification page right now, so you may not access its diamond details temporarily.

Inquirer: Many thanks for your thoughtful and thorough suggestions. After comparing the two options you shared, I’ve made up my mind to go with the first diamond listed on Blue Nile.

Ijadiamond: You’re very welcome. Feel free to reach out if you have any other questions about diamond selection or order procedures later on.

Categories
4C Diamond 101

Diamond Carat

Not all diamonds are worth buying!!!
Both milky tint and brown hue:Tap to see full diamond info
This diamond has milky:Click view detailed diamond information
This diamond has green fluorescence.:View diamond details
This diamond has a cavity:See the diamond details

Carat is a unit of weight used in the jewelry industry. Most single diamonds do not weigh much, so one carat is split into 100 points. A 0.8-carat diamond equals an 80-point stone, and a 0.3-carat diamond has the same weight as a 30-point diamond. One full carat diamond weighs 0.2 grams. The word “carat” comes from the Ancient Greek word keration. It refers to the seeds of carob trees widely grown across the Middle East. These seeds weigh almost exactly 0.2 grams, equal to one carat. People used them as a easy measuring tool for weighing gems, so carob seeds became a standard weight reference for jewelry for a long time. It was not until 1907 that international authorities officially set one carat as 200 milligrams, or 0.2 grams. This measurement rule has been used all over the world up till today.

How to Pick the Right Diamond Size

First of all, you need to make sure the diamond has an Excellent cut grade. On this base, pick the lowest clarity and color grades that look clean to naked eyes. Then choose the largest possible carat size within your budget. Many buyers hold a wrong idea. They think a diamond with a bigger table surface must have a higher carat weight. You have to stay away from so-called “flying saucer diamonds” with oversize tables. These stones cost less money, but they carry a poor cut grade. Bad cut ruins the fire and sparkle of a diamond heavily. I saw a diamond from Bluenile with a Good cut level before. Its diameter reaches 8.51 millimeters, but the pavilion depth ratio is only 55.3%. Compare it with another Excellent cut diamond. Its pavilion depth ratio hits 61.8%, and its diameter stays at the standard size of around 8.1mm.

Diamond Carat Diameter Size Chart

One of the four C standards: Carat

Rare things cost more money. In theory, gem-quality diamonds get more expensive as their weight grows. When people look at a diamond ring on a hand, the two most obvious things they notice are how shiny the stone is and how wide its diameter looks. For fancy shape diamonds, viewers focus on the stone’s length and width. The height of the diamond is hidden inside the ring setting. There is a rough linear link between a diamond’s carat weight and its diameter. A 1-point diamond will always have a smaller diameter than a 2-carat stone, for example. But cut quality changes everything. Two diamonds with the same carat weight can show totally different diameters. This creates many oddly proportioned stones. Some are tall and narrow, others short and wide, all with non-standard cutting ratios.

Diamond cut ideal and poor

How Big Is a One-Carat Diamond?

Lots of romantic TV dramas have classic scenes. Male leads get down on one knee and propose with a one-carat diamond ring. These scenes feel warm and touching. Many watchers start to wonder: just how big is a one-carat diamond actually? A standard round brilliant one-carat diamond has a diameter of 6.5 millimeters and a height of 3.9 millimeters. Its weight is 0.2 grams, which is the same as 200 milligrams. There are pictures online of a model with US ring size 6.5 wearing diamonds of different point sizes to show real visual effects.

Diamond Carat size on finger

Which Ring Styles Make Diamonds Look Larger?

Many shoppers want ring styles that make the center stone pop out. These designs offer great value for money and create strong visual impact. You can choose rings with heavy pave setting or large-sized metal bands. Young people who love unique styles can custom-make rings based on their own ideas to show their special taste. Pictures online clearly show huge visual gaps. They all use center diamonds of the exact same carat weight, but different ring frames make them look totally different in size.

Diamond ring