Keystoneite

  
Origin: McAlpine mine, Tuolumne Co., California, U.S.A.
Sample size: 6 x 4,5 x 3 cm with several areas with waxy, light green grains to 1 mm in pockets associated with a silvery unknown and rich gold veining
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Yellow keystoneite on quartz
Origin: Mcalpine Mine, Moccasin, Tuolumne Co., California, USA
Picture size: 2 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

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