The Four Sisters

I haven't been able to find something on Beruche/Bertie at all. If anyone has this info and would like to share they can e-mail me. Otherwise I might just have to get people to write me with their suggestions as to which mineral would suit her best. She can't be left out, that wouldn't be right. I know that there isn't much info here, it's just that these minerals are very rare, and so is any information on them so far. I'm still looking though.

Cooan/Catzi:
Kermesite-
An oxysulphide of antimony as a secondary ore. It is an alteration product of stibnite occurring in clusters of bright red capillary crystals.

Calaveras/Avery:
Calaverite-
AuTe₂
A gold ore found in low-temp hydrothermal veins. Found in the monoclinic system, however distinct crystals are rarely formed. It is more often granular, and can sometimes be twinned. Very brittle and opaque, it can be colored brass-yellow to silver-white with a metallic luster.

Petz/Prisma:
Petzite-
(Ag, Au)₂Te
Petzite is a very rare telluride of silver and/or gold

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