Chalcocite Pseudo. After Covellite
Butte, Silverbow County, Montana, USA
Small Cabinet, 8.0 x 6.3 x 3.6 cm
Ex. Dr. Ed David; August Pohndorf; Gerald C. Herfurth
A shockingly scupltural cluster of fine crystals of LARGE covellites, that have been completely replaced by lustrous, jet black chalcocite. This is a MAJOR Butte specimen of some importance, just for the size alone. However, given the good aesthetics and nearly pristine condition, it is also a fine display quality specimen by any standard aside from the historical significance of the piece for the locale. It was in the Gerald Herfurth collection for 40 years, previously to Ed's purchase of it. Herfurth acquired it in 1958 from Pohndorf, a noted Colorado dealer and collector of the time. Verbally, it was said that this was found in 1883 and this was noted on Herfurth's card label (back side of the side shown). We know it is old, certainly, but if it really is THAT OLD, this is even more a piece of import.