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Diamond Certification And Diamond Care
Before purchasing a diamond, you should expect to review a copy of its certificate, as this is your only guarantee of the quality and value of that diamond.

What's in a Certificate?
A diamond certificate, also called a diamond grading report, diamond dossier®, or diamond quality report, is a report created by a gemologist, or gemologists, who have scrutinized the diamond and placed it under a microscope to analyze its dimensions, clarity, cut, color, finish, symmetry, and other characteristics.

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). Blue Nile works with these independent laboratories, as they are some of the most respected laboratories in the diamond industry. These two laboratories are known for having the most strict, consistent, and unbiased systems for grading diamonds. Diamonds that are accompanied by these grading reports are the most highly valued in the industry, as their quality is considered guaranteed.

Also, in addition to being graded by either the GIA or the AGSL, all Blue Nile Signature Collection diamonds are certified by GCAL. This additional certification 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.

View Certificates While Shopping
At Blue Nile, you can view certificates for many of the diamonds we offer. Read on to learn more about each certificate:

  • GIA Diamond Grading Report
  • GIA Diamond Dossier®
  • AGSL Diamond Quality Document
  • Appraisal Document
  • GCAL Certificate of Diamond Authenticity

If you are interested in a diamond and a certificate is not available for viewing, contact a diamond and jewelry consultant at or 800-242-2728.


HEAD OFFICE : Chinoy Mansion, First Floor, Block # 2,
Opposite St. Stephens Church, Warden Road, Mumbai(Bombay)-400 036 India.
091-22-23676218 / 23679302