Because of each country's product availability, the selection on this site may not be the same as the one you were previously on.Confirm Cancel
Sign up now to receive the latest offers on fine jewellery from Blue Nile
Thank you for subscribing!
A Diamond Grading Report documents the specific characteristics of a diamond. These reports are issued by the Gemmological Institute of America (GIA), which is among the most respected organizations in the diamond industry.
All Blue Nile Signature Collection diamonds are certified by the Gem Certification & Assurance Lab (GCAL) in addition to being graded by the GIA or AGSL. This provides you a second authoritative analysis of your diamond. GCAL also verifies that your diamond meets all the specific quality requirements of the Blue Nile Signature Collection.
GEMPRINT® is the world's most sophisticated, non-invasive, positive identification technology that records the unique optical 'fingerprint' of each diamond. Just like a human fingerprint, every diamond has a unique Gemprint®. Invented in 1976, this patented and proven technology has been used by the FBI and Canadian Government.
A Diamond Quality Document, issued by the American Gem Society Laboratories (AGSL), is universally accepted and respected by the jewellery industry as a document of authenticated quality.
This print out illustrates how diamonds of different carat weights and shapes will appear when viewed from the top down.
Your diamond may differ from the printout in length/width ratio, table, and depth.