COBALTOAN CALCITE WITH MALACHITE. ... Minerals Crystals | Lot #49062 | Heritage Auctions
COBALTOAN CALCITE WITH MALACHITE Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), DRC - Available at 2012 May 20 Natural History &...
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Bustamite: Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite could be confused with light-colored rhodonite or pyroxmangite, but both these minerals are biaxial (+) whereas bustamite is biaxial (-).