[Jewelry making - Article 00117] - [Orchid] Cobaltocalcite pink to blue?

[wemery AT earthlink.net]

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>     Cobaltocalcite - Also referred to as "Pepto-Bismol" stone, due to
>     the real name being a bear. The pink color of the druzy is almost
>     exactly that of the medicine in the bottle. 

    Noel, Actually, i think the "cobaltocalcite" is actually
    cobaltodolomite. Calcite is CaCo3, dolomite is MgCo3.  Whatever, the
    coloration is due to a cobalt or cobalt-manganese impurity, which
    would not be the same as cobalt carbonate. However, if you'll tell me
    the kiln tempaerature used to oxidize the cobalt carbonate to the
    oxide, I'll experiment with  some pieces of the pink material and
    pass the results on to the Orchid network. I bought a couple boxes
    of it a few years ago in Tucson! My guess is that the dolomite will
    just break down... 

Wayne Emery 

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