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
Founded in Seattle back in 1999, Blue Nile stands as one of the world’s leading online diamond jewelry retailers. In 2026, it completed a merger with James Allen, and all services of both brands now run uniformly on Blue Nile’s official website.
Cutting expensive overhead from physical stores, Blue Nile cooperates directly with global diamond wholesalers, holding one of the largest loose diamond inventories in the industry. Its prices are far more affordable than local brick-and-mortar jewelry shops. All natural diamonds come with GIA certificates, while lab grown diamonds are certified by IGI; standalone GCAL certificates are no longer offered on the platform.
Shoppers can freely match loose diamonds with various ring settings for custom engagement rings. It runs 24＋ physical showrooms across many U.S. cities, provides round-the-clock professional customer support and a 30-day free return policy. Its former premium Astor series with extra GCAL verification has been discontinued, and Curated Diamonds are its main product line for global buyers at present.
- Blue Nile’s Inventory & Selection
After Blue Nile merged with James Allen, their combined diamond inventory leaves all other online diamond retailers far behind by a wide margin. The full collection covers all grades of both natural and lab-grown diamonds, with a total stock of over 600,000 pieces. The inventory is continuously updated and expanded, so there is always a perfect stone for you and your partner.
The most affordable natural diamond in Blue Nile: 229 USD GIA 0.24 Carat Oval Diamond
The highest-priced natural diamond in Blue Nile: 2385168 USD GIA 20.28 Carat E-VVS1 Excellent Cut Round Diamond
The most affordable lab grown diamond in Blue Nile: 207 USD IGI 0.30 Carat D-VS2 Ideal Cut Round Lab-Grown Diamond
The highest-priced lab-grown diamond in Blue Nile: 153320 USD GIA 12.20 Carat Heart Lab-Grown Diamond
- Blue Nile’s Diamond Pricing
Blue Nile avoids the huge rent and labor costs of regular physical jewelry stores, only running small showrooms for customer visits. It sources diamonds straight from global wholesalers, so stones with identical 4C specs cost just 60% to 70% of what traditional brick-and-mortar shops charge, delivering outstanding value for money.
After merging with James Allen, bulk group purchasing has further lowered its overall costs. All loose diamond prices are fully transparent, with separate pricing tiers for natural and lab-grown diamonds that fit every budget ranging from several thousand to hundreds of thousands of US dollars. When compared to competing online diamond retailers, Blue Nile consistently offers more cost-friendly options. Below is a price comparison of diamonds of different grades between Blue Nile and rival platforms.
| Blue Nile | Other Brand | |
| 1 carat E VVS2 3EX None | $6000＋ | $7000＋ |