Loose Diamonds: Buy Certified Diamonds Online | Blue Nile

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Diamonds

With an incredible selection of 150,000+ GIA-graded diamonds, and at prices up to 40% less than traditional retailers, we’re confident you’ll find your perfect diamond.

With an incredible selection of 150,000+ GIA-graded diamonds, and at prices up to 40% less than traditional retailers, we’re confident you’ll find your perfect diamond.
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Build Your Own Ring®

Build Your Own Ring®

Choose your perfect diamond and match it with a stunning engagement ring from our handcrafted collection.

Build Your Own Diamond Pendant®

Build Your Own Diamond Pendant®

Create a timeless diamond solitaire pendant with a wide assortment of styles, perfectly suited to your choice of center stone.

Build Your Own Three-Stone Ring®

Build Your Own Three-Stone Ring®

For your past, present, and future, create a stunning three-stone diamond ring to symbolize your unique love story.

Build Your Own Earrings®

Build Your Own Earrings®

Create your own perfect pair with perfectly-matched diamonds placed in an essential earring style.

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Diamond Price Guarantee

Diamond Price Guarantee

Shop happy! We guarantee the best possible diamond price on every certified loose diamond in our collection.

Lifetime Diamond Upgrade

Lifetime Diamond Upgrade

Discover the benefits of our diamond upgrade program, part of our commitment to being your jeweler for life.

Astor by Blue Nile™

Astor by Blue Nile™

Astor by Blue Nile™ diamonds are cut for brilliance and are exceptionally rare. Only 1 in 1,000 diamonds qualify. Learn More.

Top Twenty Engagement Rings

Top Twenty Engagement Rings

From simple solitaires to exceptional diamond halos, our customers love these engagement ring styles.