Eucairite

Eucairite, hard to discern since it is mixed with gray berzelianite in calcite
Origin: Ustalec near Horazdovice, Czech Republic
Sample size: 2 x 1.5 x 1 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

  
Origin: Skrikerum Mine, Valdemarsvik, Östergötland, Sweden (type locality)
Sample size: 4.5 x 2.5 x 3.2 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

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