Cuprobismutite

Black metallic cuprobismutite in matrix
Origin: Tuva, Transbaikal, Russia
Sample size: 1.1 x 1.8 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Greyish grey crystals to less than 1 mm with silvery, long bladed crystals of bismuthinite.
Origin: Tunnel Extension mine, Marysvale, Piute Co., Utah, United State
Sample size: 12 x 10 x 13mm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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