Four Treasures Reference Database
Record No. 6114
Gem News International: Exceptional rough and cut blue sapphire from Rock Creek, Montana
Journal Article
Hsu, T. and Stone-Sundberg, J. (2020) Gem News International: Exceptional rough and cut blue sapphire from Rock Creek, Montana. Gems & Gemology, Vol. 56, No. 1, Spring, p. 169.
ISBN/ISSN: 0016626X | RWHL*
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gems, corundum, USA.12, Montana.12, Rock Creek