Rock Creek Sapphire (American Sapphire Gem Mine; Gem Mountain Mine; Anaconda-Sapphire Gulches; Chaussee Sapphire Corp. Mine; American Gem Corp.), Rock Creek Mining District, Granite Co., Montana, USA

Gemstone List

Copyright © Jolyon & Katya Ralph 1993-2023. Site Map. Photographs are copyright of the individuals who submitted them. For more information please contact the . is an online information resource dedicated to providing free gemmological information to all.