Brannerite

Black grains of brannerite with gold
Origin: Witwatersrand field, South Africa
Picture size: 4 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

Origin: Mina Dieresis, Cordoba, Spain
Sample size: 3 x 2.5 x 2.5 cm
 
  
Origin: Hornachuelos, Sierra Albarrana, Cordoba province, in southern Spain
Ex. Marty Zinn collection
Sample size: 6.1 x 4.2 x 3.7 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

Black crust on matrix; collected in 1953
Origin: Bou Azzer, Anti-Atlas Mts, Morocco
Sample size: 7 x 7 x 13 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Greenish brown glassy mass - metamict.
Origin: Crocker's Well East, Olary Ranges, South Australia, Australia
Sample size: 2.5 x 2 x 1 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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