Thorutite

  
Origin: Brumado Mine, Bahia, Brazil
Sample size: 2 x 1 cm specimen of calcite (magnesite?) with two crystals of thorutite and a light coating of agardite
 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

  
Micro black, crude crystals to about 1 mm.
Origin: Buckwheat mine dump, Franklin, Sussex Co., New Jersey, United States
Ex. Kidwell collection
Sample size: 6 x 5 x 3 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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