Forums Beginner Questions Dealing with unknown material Reply To: Dealing with unknown material


Alan Balmer

As far as a rule of thumb for unknown material, all I can think of is “Assume the worst.” 🙂

Yes, there is a well-developed methodology for identifying unknown gem materials. If you have the time and money, a course in gemmology will teach you a lot. One of the most important free resources is and their forum.

Are you a member of USFG? If you are, there is a series of articles, “Kitchen Counter Rock and Gem ID”, by Sue Lichtenberger, MD, starting in the December 2015 issue of the USFG Newsletter.

If you’re not a member, it’s the best $18 you’ll ever spend.