Pyrolusite

  
  
 
  
Origin: Elgersburg, Ilmenau, Thuringia, Germany
Sample size: 4.2 x 3.7 x 2.5 cm (top/2nd row), 7.2 x 4.3 x 3.5 cm (bottom)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Origin: Clark Mine, Copper Harbor, Keweenaw Co., Michigan, U.S.A.
Sample size: 8.6 x 5.5 x 4.3 cm
 
  
brown prismatic non-terminated pyrolusite crystals to 8 mm in length set in a quartz crystal lined vug measuring 17 x 24 mm in size.
Origin: Taylor Mine, Alberta, Baraga Co., Michigan, U.S.A.
Sample size: 9 x 6.5 x 5.5 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

  
Origin: Black Widow mine, Pinal Co., Arizona, United States
Ex. Polak collection
Sample size: 7 x 5 x 5 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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