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Opal from
Red Bluff, Lower Hot Springs Mining District (Norris Mining District), Madison Co., Montana, USA

Formula:SiO2 · nH2O
Validity:Believed Valid
References:USGS Bull 574
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Red Bluff, Lower Hot Springs Mining District (Norris Mining District), Madison Co., Montana, USA
Nearest other occurrences of Opal
36.6km (22.7 miles) Three Forks Placer, Gallatin Co., Montana, USA
99.9km (62.1 miles) W. Wilson Mine (Liverpool Mine), Clancy-Lump Gulch Mining District, Jefferson Co., Montana, USA
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