Chalcocite pseudomorphs after Covellite - image 1

Chalcocite pseudomorphs after Covellite

Kevin Brown
Kevin Brown
Parker, TX
0 for sale·Member since 2026
Chalcocite pseudomorphs after covellite, 8.1 cm, from Butte, Silver Bow County, Montana. Collected in 1883, ex collections of August P. Pohndorf, Gerald Herfurth, Ed David, and Wouter Van Tichelen. Photo by László Kupi.

Product details

Species
Chalcocite, CovelliteAbout Chalcocite →
SizeSmall Cabinet
Dimensions8.1 cm
Added on03/26/2026
Locality
USA, Montana, Butte Mining DistrictRegional guide →
Publications
  • Mineralogical Record The Kevin Brown Collection page 197

Known provenance

DateCollectorAcquisition price
—Wouter Van TichelenNot disclosed
—Ed DavidNot disclosed
—Gerald HerfurthNot disclosed
—August P. PohndorfNot disclosed

Learn more

Chalcocite
Mineral guide
Learn about Chalcocite
dark steel-gray crystals with bright metallic luster and dramatic twinning; rare, well-formed specimens attract collectors and highlight sites.
Chalcocite
Regional guide
Chalcocite from Butte Mining District, Montana, USA
Butte chalcocite is a collector’s mineral with two identities at once: it is a serious ore mineral from one of the world’s great copper districts, and it is also a surprisingly sculptural display species when it preserves the bladed, stacked, pseudohexagonal forms inherited from covellite. The classic pieces are not bright copper-color showpieces; they are dark, metallic, and architectural—steel-gray to blue-black blades, plates, rosettes, and “jackstraw” aggregates that can sit on sparkling pyrite and quartz like blackened machinery from the hill itself.