Krupkaite

  
 
  
 
  
 
  
Fred DeVito Collection, Acicular, fine metallic crystal sprays to 4 mm with excellent coverage in vuggy matrix associated with possible hodrushite and benjaminite according to the original label.
Origin: Julcani mine, Huancavelica, Peru
Sample size: 1 cm, striated golden brassy crystals to 1 mm (top), 2 x 1 x 1 cm, striated golden brassy needles to 2 mm (2nd row), small 8 mm piece with exceptional brassy gold crystals to 2 mm in sulfide matrix (3rd row), 3 x 3 x 3 cm (bottom)
 
  
Steel-gray grains of krupkaite to 0.2 mm embedded in matrix.
Origin: Krupka, Krusné Hory Mts, Erzgebirge, Bohemia, Czech Republic (type locality)
Ex. Polak collection
Sample size: 4.5 x 3 x 2.5 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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