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Cobaltocalcite, Katanga; 2 1/2" across

Some of the world's greatest specimens of cobaltocalcite occurred at the mines around Kolwezi. This is a fine exmple,  The dark green species on this piece is kolwezite. Cobaltocalcite owes its color to cobalt. 

 

Matthew Webb Photo

www.bluemelon.com/exclusiveminerals  


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