Our Finest Cut          

Every diamond in the Blue Nile Signature Collection is hand-selected and cut to the most exacting standards — guaranteeing a more brilliant diamond than any other Ideal cut. Custom made exclusively for Blue Nile, the Blue Nile Signature Collection includes the world's most brilliant round diamond, as well as the world's first and only princess, emerald, and Asscher diamonds cut to our finest ideal standards.


Blue Nile Signature Round Diamonds

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Blue Nile Signature Princess-Cut Diamonds

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Blue Nile Signature Emerald-Cut Diamonds

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Blue Nile Signature Asscher-Cut Diamonds

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How Cut Makes the Signature Difference

How Cut Makes the Signature Difference  

Precise proportions maximize brilliance, and make Blue Nile Signature Collection diamonds the finest of all ideal-cut diamonds.
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Signature Laser Inscriptions

Because the outstanding quality of these diamonds is so rare each one has a laser inscription, legible only at 50x magnification and guaranteed not to affect brilliance.
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Read Customer Feedback

 4.9 Average Customer Feedback.

Our customers say it best. Read the comments that customers have sent us about their Blue Nile Signature Collection diamond.
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Signature Diamond Jewelry

Signature Diamond Jewelry  

For a truly extraordinary gift, view our Blue Nile Signature Jewelry Collection.
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