Four Treasures Reference Database
Record No. 1792
The Missouri River holds one of America’s most interesting precious gemstones
Magazine Article
Voynick, S.M. (n.d.) The Missouri River holds one of America’s most interesting precious gemstones. French Bar, pp. 1–4.
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corundum, USA.12, Montana.12, gems
Discusses the sapphires occurring in placer gravels along the Missouri River near Helena, Montana, probably including the historic French Bar sapphire locality. The article appears to describe the discovery, occurrence, mining, and gem characteristics of Missouri River sapphires and their significance among American gemstones.