How to identify rocks with your phone
Here's how to identify rocks with your phone ... There's Rock Identifier: Stone ID, Rock & Crystal Identifier, Rock Master: ...
Gemological Institute of America7y
Turquoise-Rock Crystal Composite
This 21.58 ct composite was found to have a top section of natural rock crystal and a base of natural turquoise. Photos by Gagan Choudhary. Recently examined was a faceted rock crystal backed by a ...