Festerling Mine, Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
Festerling Mine (Elsicor Mine; Cora Mine), Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
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Black to dark brown goethite, with a yellow streak, replacing an elongated mineral, probably wollastonite. Self collected. Rolf Luetcke specimen and photo.
- 2nd September 2018
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