Jarosite
Double Rainbow Mine, Galena, Galena Mining District, Lawrence County, South Dakota, USA
2.2 x 2.1 x 0.7 cm. PLEASE NOTE: This piece came labeled as coming from the Richmond Sitting Bull Mine in Deadwood, South Dakota, but jarosite is not reported from this locality. If anybody out there has some insight as to the origin or identity of this specimen, please let us know. Tiny, sharp, well-formed reddish-brown colored crystals sit on a ...
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