AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from South Dakota > Columbite-Tantalite

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Online Mineral Museum Archive of Mineral Photographs and Mineral Descriptions from John Betts - Fine Minerals.com and Allminerals.com

   

Columbite-Tantalite from Keystone Mine, Pennington County, South Dakota

 
Columbite-Tantalite from Keystone Mine, Pennington County, South Dakota

Columbite-Tantalite from Keystone Mine, Pennington County, South Dakota

Columbite-Tantalite from Keystone Mine, Pennington County, South Dakota

DESCRIPTION:No. 63687
Mineral:Columbite-Tantalite
Locality:Keystone Mine, Pennington County, South Dakota
Description:Lustrous black columbite-tantalite crystal on platy translucent gray albite var. cleavelandite. The columbite-tantalite crystal has two faces visible with incomplete terminations. Testing is required to determine whether it is columbite or tantalite. Ex. Irving Horowitz collection #1279; ex. Max Marty
Overall Size:7x6.5x5.5 cm
Crystals:60 mm
Archived: For reference only

 

 

 

 

 

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