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Chalcedony from
Mount Washington Mine (Deer tunnel; Monongahela-Mount Washington M. Company; Angelica Mining & Development Company; Salvail), Colorado Mining District (Prickly Pear Mining District; Corbin Mining District), Jefferson Co., Montana, USA

Locality type:Mine
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Believed Valid
References
References:U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Mount Washington Mine (Deer tunnel; Monongahela-Mount Washington M. Company; Angelica Mining & Development Company; Salvail), Colorado Mining District (Prickly Pear Mining District; Corbin Mining District), Jefferson Co., Montana, USA
Nearest other occurrences of Chalcedony
10.4km (6.5 miles) Argonne Mine, Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
14.7km (9.1 miles) G. Washington Mine (Member of Presidents Group), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
15.8km (9.8 miles) W. Wilson Mine (Liverpool Mine), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
15.8km (9.8 miles) Red Rock Mine, Jefferson Co., Montana, USA
16.0km (10.0 miles) Indian Head Rock, Basin, Jefferson Co., Montana, USA
16.4km (10.2 miles) Little Nell Mine (Little Nellie Mine), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
18.1km (11.3 miles) Roosevelt Mine, Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
27.0km (16.8 miles) Meadow Mine (Haab), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
47.8km (29.7 miles) Eldorado Bar deposit (Eldorado Strip Mine), Eldorado Bar, East Helena, Lewis and Clark Co., Montana, USA
49.7km (30.9 miles) Butte Mining District (Summit Valley Mining District), Butte-Silver Bow (Butte; Silver Bow Co.), Montana, USA
 
Mineral and/or Locality  
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