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21hhdw.g   ((COLUMBITE)),   $50 MINIMUM BID,  Barker-Ferguson Mine, Keystone, Keystone Mining District, Pennington Co., South Dakota, USA,  5.5 x 3 x .5 cm, Miniature




Flat crystal of Columbite, a Niobium oxide species.  These are found in the Pegmatites and are difficult to extract in large crystals as this one from the matrix rock.    ex Dana Wilson MD #367. 


Sold For: $50
To: Australia50


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