In there as well may be tiny white calcite crystals, micro-crystals of chalcopyrite, and microcrystals of several rare species including xanthoconite
1882 Stephanite, Xanthoconite
and Proustite, Cobalt, Ontario, Canada, no.
Matrix, when present, is a dark gray, silicified mixture of silver sulfides and sulfosalts, with tiny wires of silver and microcrystals of xanthoconite
In addition to galena and barite, proustite is usually associated with xanthoconite
The mineralization consisted of patches, grains and intergrowths of argentite/acanthite, proustite, xanthoconite
, smithite, miargyrite, argyrodite, unidentified bismuth sulfosalts (Gasparrini, 1978), jordanite, pyrargyrite and gersdorffite (Taylor, 1984).
In 1996 a single 1-mm, orange, thin-tabular hexagonal platelet of twinned xanthoconite
was found with pyrostilpnite and pyrargyrite in the newly opened Potosi vein.