The 5th C - Certification
For a purchase as significant as a diamond, make sure you’re getting exactly what you’re paying for. Learn about the laboratories that issue diamond grading reports or certificates and their different grading systems, so you can buy with confidence.
How to Read a GIA Diamond Grading Report
Does the GIA Grade Lab-Grown Diamonds?
Diamond Certification FAQ
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!