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Marketing themselves to a new generation of diamond-buyers, James Allen and Blue Nile are online retailers which have, in recent years, revolutionized the experience of purchasing luxury jewelry such as diamond engagement rings.

By providing an enormous range of loose diamonds at incredibly competitive prices, as well as a Signature Range each, both companies hold a niche in the market for those looking to make a purchase in a lower price bracket, whilst still providing a high-quality service with an emphasis on excellent customer experience.

With so many similarities, you might be left wondering: what’s the best way to choose between these two brands? Fortunately, our in-depth comparison will provide you with all the details you need to make the right choice for you.

Choice of diamonds

One of the first things any buyer wants to know is how much choice they’re going to have when it comes to selecting their product, and customers of both brands will be pleased by an enormous selection. But who wins out in this statistical sweepstake?

A 1.00 carat H-VS2 oval cut diamond displayed on James Allen's website. The diamond is priced at $2,900 and features H color and VS2 clarity. The image showcases a detailed close-up of the diamond, highlighting its brilliance and facets.

A 1.00 carat H-VS2 oval cut diamond priced at $2,900 on James Allen. The diamond offers excellent clarity and color, with flexible payment options and free overnight shipping available.

James Allen and Blue Nile are pretty similar in terms of numbers: the former has an inventory of around 210,000 loose diamonds, whilst the latter sits somewhere around 198,000. When it comes to setting designs, James Allen wins again, with more than 590 unique designs available in comparison to Blue Nile’s 360+. However, realistically that’s not an issue as long as you find ‘the one’ for you.

A 1.00 carat round diamond displayed on Blue Nile's website. The diamond is priced at $4,120 and features G color and VS2 clarity with an excellent cut. The image shows a detailed close-up of the diamond, highlighting its brilliance and facets.

A 1.00 carat G-VS2 excellent cut round diamond priced at $4,120 on Blue Nile. The diamond offers exceptional brilliance and clarity, with flexible payment options and free overnight shipping available.

If you’re looking for a colored diamond, both James Allen and Blue Nile will be able to provide it. James Allen’s selection is smaller, but because they offer lab-created diamonds as well as earth-created ones, they are able to charge a slightly lower price. Blue Nile, meanwhile, has more colored diamonds at a higher price point.

Ultimately, between the two there is not much difference. However, the greater selection offered by James Allen means that it just wins out over its competition.

Before purchasing any diamond, please get in touch directly. I offer a free service to make sure that you find the right diamond for your budget.

Price, Returns and Guarantees

Just as important as the selection of diamonds is the price tag attached to them. Both Blue Nile and James Allen are budget sellers, with prices around 25-40% lower than physical stores regardless of which retailer you choose, so both are winners really.

However, Blue Nile is slightly cheaper, particularly when it comes to engagement rings. Comparing two engagement rings of similar design with the same setting, Blue Nile comes out less expensive. Apart from this, the two brands are effective even in terms of price across the board, with a few individual exceptions.

A classic six-prong solitaire engagement ring in 14k white gold displayed on Blue Nile's website. The ring setting is priced at $600 and is shown with a round diamond. It has a 2.00mm band width and a rhodium finish. The page highlights flexible payment options, free fast shipping, and hassle-free returns. The ring can be customized with additional metal types and a free inscription.

Classic six-prong solitaire engagement ring in 14k white gold priced at $600 on Blue Nile. The setting features a 2.00mm band width, rhodium finish, and options for customization, with free fast shipping available.

Both companies offer a 30-day money back guarantee on their products; return shipping is free for James Allen and at the customer’s expense for Blue Nile. Similarly, James Allen’s warranty policy is more generous: their lifetime warranty covers repairs and maintenance, whereas Blue Nile’s is just a manufacturing warranty.

A 14K white gold 2mm knife edge solitaire engagement ring displayed on James Allen's website. The ring setting is priced at $660 and shown on a hand, highlighting its elegance and simplicity. The setting features a 2mm band width and can be customized with different metal options.

14K white gold 2mm knife edge solitaire engagement ring priced at $660 on James Allen. The setting offers a sleek and elegant design, with options for customization and real-time ring inspection available.

James Allen also offers free prong tightening, re-polishing, rhodium plating and cleaning services, whereas Blue Nile offers complimentary cleaning and inspection. However, where Blue Nile offers a buyback program, James Allen does no such thing.

While the two brands are largely neck-and-neck on price, James Allen offers a more generous warranty and returns policy, whilst Blue Nile customers can benefit from the buyback program. Here, then, they are equal overall.

Imagery + Website

Since both brands are primarily online retailers, their websites play a significant part in how much product they sell. It therefore makes sense that both websites are very intuitive and easy to use.

Both James Allen and Blue Nile have a filtering feature that allows customers to narrow down their options and find exactly what they’re looking for. Today, both sites are very similar in offering video views, certification, and basic information for diamonds. However, they both lack light performance images and hearts and arrows views on the majority of their diamonds, which makes analyzing diamond quality more challenging.

What really sets James Allen apart from its competitor is its incredibly high-quality and detailed images, which allow customers to see imperfections in the diamonds using the Super Zoom feature. This uniquely good imaging makes James Allen the clear winner here.

Signature ranges

Both Blue Nile and James Allen offer signature ranges called, respectively, Astor and True Hearts. Naturally, these ‘premium’ in-house cuts rack up an additional price.

Unfortunately, Astor does not quite justify its price hike. Although the diamonds are good-quality and of course very beautiful, they lack supporting technical data and certification, and are cut less precisely than True Heart diamonds, which are ‘near flawless’ although equally unsupported by technical data.

A 1.00 carat round diamond displayed on Blue Nile's website. The diamond is priced at $9,260 and features H color and VS2 clarity under the Astor signature range. The image shows a detailed close-up of the diamond, highlighting its facets.

A 1.00 carat H-VS2 round diamond priced at $9,260 on Blue Nile. Despite its Astor signature range, the diamond lacks light performance images, likely due to significant light leakage.

This minor difference in quality marks James Allen out as the winner, just about.

A 1.05 carat H-VS2 True Hearts™ cut round diamond displayed on James Allen's website. The diamond is priced at $5,250 and features H color and VS2 clarity. The image shows a detailed close-up of the diamond, with additional icons for 360° view, super zoom, and hearts image.

A 1.05 carat H-VS2 True Hearts™ cut round diamond priced at $5,250 on James Allen. It includes a hearts image, but lacks ASET and IdealScope images, limiting the analysis of light leakage.

For those seeking the highest quality, consider the Whiteflash A CUT ABOVE® diamonds. Whiteflash goes above and beyond, providing two diamond videos (brilliance and sparkle), IdealScope, ASET, Hearts and Arrows images, and a Sarine report on their in-house diamonds. To learn more, read my review on Whiteflash diamonds.

Who’s better?

Despite the minor differences and details brought out in this article, the truth is that both Blue Nile and James Allen are fantastic budget diamond retailers. You can’t really go wrong with either brand.

However, if you’re looking for additional security in the forms of returns, warranties and high-quality product images, James Allen is the way to go. If you’re after a specific engagement ring setting, take a look at Blue Nile. Whichever you choose, you can feel confident in making a great choice.

Tip: If you’re looking for superior cut quality to James Allen and Blue Nile, then have a read of my Whiteflash A CUT ABOVE® Diamonds Review, alongside that I would also recommend reading my Tiffany and Hearts on Fire reviews.