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?
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™.
Anyhoo… cobalt… yes, I think blue. The only question I saw pop
up was cobaltodolomite 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,
Sebaste Studio and
Carolina Artisans’ Gallery
Charlotte, NC (USA)