MIX1 Arsenpolybasite, Prousitite, Acanthite, Manganocalcite

Uchucchacua Mine, Lima Dept., Oyon Prov., Peru

2.7x 2.2x 1.8 cm

$125

This specimen comes from a small find made in 2004, and which was mentioned in the "What's New in Minerals" section of the March-April 2004 issue of the Mineralogical Record.  It consists of three silver minerals: arsenpolybasite, acanthite, and prousite, all on a manganocalcite matrix.  If you look closely, you can see the clusters of hexagonal arsenpolybasites on the left, the proustite crystal on the right, and a jumble of micro acanthites separating the two.

All in all a spectacular thumbnail, and an example of three rare silver species.