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Photomicrograph showing four groups of paracostibite grains (white) associated with sphalerite (grey), and chalcopyrite (liglit grey). Dark areas are pits. (CanMin v 10:232).
Drill-core from claims held by Cochenour Willans Gold Mines Ltd. in Mulcahy Township, District of Kenora, Red Lake Mining Division, Ontario, Canada.
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