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What is a Certificate?
Blue Nile Diamonds are Certified
Every loose diamond sold by Blue Nile has been analyzed and graded by either the Gemological Institute of America (GIA) or the American Gem Society Laboratories (AGSL). These two laboratories are among the most respected laboratories in the diamond industry, and are known for their consistency and unbiased diamond grading systems. Diamonds that are accompanied by these grading reports are the most highly valued in the industry.
In addition to being graded by either the GIA or the AGSL, all Astor by Blue Nile™ diamonds are graded by GemEx - the leader in light measurement - for its brilliance, fire, and sparkle. This second independent analysis guarantees the Astor by Blue Nile diamond's uncommon brilliance.
View Certificates While Shopping
If you are interested in a diamond and a certificate is not available for viewing on the site, simply contact a diamond and jewelry consultant at firstname.lastname@example.org or 1-800-242-2728.