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Montana, USA

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Gemstone List

Gem list contains entries from all listed localities in region.

Gemstones from Montana, USA by Colour

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Localities in this Region

USA

Montana
- Deer Lodge County
  - Orofino Mining District
    - Dry Cottonwood Creek
      - Dry Cottonwood placer
- Granite County
  - Rock Creek Mining District
    - Rock Creek Sapphire (American Sapphire Gem Mine; Gem Mountain Mine; Anaconda-Sapphire Gulches; Chaussee Sapphire Corp. Mine; American Gem Corp.)
- Judith Basin County
  - Little Belt Mountains
    - Yogo District
      - Yogo Gulch
- 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)
- Silver Bow County
  - Butte Mining District (Summit Valley Mining District)

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