URI9 Gratonite
Excelsior Mine, Cerro de Pasco, Pasco Department, Peru
2.9x 2.6x 1.9 cm
$485

A great thumbnail of this rare iron arsenic sulfide.  This species is known from a number of localities world wide, but the only ones that I have ever seen for sale (including this one) are from old (pre-1950) finds in the Cerro de Pasco area.  This is a particularly good thumbnail, The ball of gratonite is positioned  nicely on its matrix, and I can see only one missing crystal in the whole cluster.

 

This is a beautiful thumbnail of one of the rarer South American sulfides.








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