[Jewelry making - Article 00118] - [Orchid] Cobaltocalcite pink to blue?

[Dave Sebaste]

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>     Cobaltocalcite is presumably colored by cobalt. I know from decades
>     of ceramics that cobalt carbonate is pink, whereas cobalt oxide is
>     typical cobalt blue. Does that mean that heat or other treatment
>     would turn cobaltocalcite blue? 

    Hi Noel! 

    *I* sure as heck wouldn't know! That's what my respected and trusted
    gem dealers have told me it was when I bought it. They're all
    probably in Tucson (hating I'm not headed to Mecca, too), and too
    busy to keep up with OrchidMail(tm).  :) 

    Anyhoo... cobalt... yes, I think blue. The only question I saw pop
    up was cobalto*dolomite* being suggested by our respected friend Beth
    Rosengard. The "cobalto" portion doesn't seem to be in question...
    but the rest??? 

    Considering the relative abundance of Cobaltocalcite(dolomite) on
    the market, and the other treated drusies, I suspect some marketeer
    would have fried some of it to see what other "flavors" they could
    create. I haven't yet seen any such critters on the market... 

    All the best, 

Dave

Dave Sebaste
Sebaste Studio and
Carolina Artisans' Gallery
Charlotte, NC (USA)
dave AT sebaste.com
http://www.CarolinaArtisans.com 

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