Byströmite

  
Tannish fine granular matrix with reddish brown, fine granular ordonezite.
Origin: Fortuna mine, El Antimonio district, Mun. de Caborca, Sonora, Mexico (type locality)
Sample size: 5 x 5 x 3 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

  
Ochre-brown blebs in matrix
Origin: Prospect 27 km SW of Agua Prieta, Sonora, Mexico
Sample size: 5 x 5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

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