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Lewis and Clark County
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Montana
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USA
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Gemstone List
Gem list contains entries from all listed localities in region.
Localities in this Region
USA
Montana
Lewis and Clark County
East Helena
Eldorado Bar
Eldorado Bar deposit (Eldorado Strip Mine)
Helena Mining District (Spring Hill Mining District)
Helena area
Missouri River gravel bar
Missouri River placers
Spokane Bar (American Gem Corp.; Spokane Bar Sapphire Mine)