PAS-124
Stibarsen
Miniature, 4.7 x 3.2 x 3.2 cm
American Eagle, Luona Occurrence, Elk Mountain District, Gunnison Co., Colorado (probable)
Ex. Philadelphia Academy of Natural Sciences
SOLD

This is a rich specimen of stibarsen, with spheroidal nodules and massive seams in ore matrix. Since we know this is from North or South America (as the collection was divided, it was in the North & South American group...), even though the label has somehow been lost since then, we know that this is not a European specimen and so is either from Gunnison Co., Colorado or from Ophir Mine in the Comstock Lode, Nevada. However the Nevada locality has no associations of red minerals listed as occurring there, while several occur in the Colorado locale - and this piece has small red flecks of two different species present on it. So although the locality is given without a confirming label, we think it to be a correct one.