Frequently Asked Questions
I found a clear, colorless stone that I think may be a diamond because it scratches glass. How can I find out for sure?

Many minerals are colorless in their purest state. Anything with a hardness the same as or greater than glass (5 to 6 on the Mohs hardness scale), can scratch glass. Therefore, other gemological tests must be performed to confirm identification.
You can submit your stone to GIA for identification or have a local gemologist help you identify the stone.
Learn more about GIA Identification services.

You Might Also Like

Find a Retailer
learn more
Shop the Campus Store
Learn More
Quality Assurance Benchmarks
Learn More
Gems & Gemology
G&G Winter 2017 Edition
Learn more