|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from South Dakota > 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|
|Status:||Sold - Posted here for reference only|
|Buy similar:||Minerals from Midwest, USA > Oxide Mineralss|
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