- a common mineral, cuprous sulfide, Cu2S: an important ore of copper.
Origin of chalcocite
Examples from the Web for chalcocite
Historical Examples of chalcocite
No traces of other primary minerals are present and the chalcocite here is regarded as probably primary.
In the United Verde Mine, oxidizing conditions at present prevail to the bottom of the chalcocite zone.
Copper pyrites (or yellow ore), erubescite (or purple ore), and chalcocite (or grey ore) are the most important.A Textbook of Assaying: For the Use of Those Connected with Mines.
Cornelius Beringer and John Jacob Beringer
Chalcocite occurs in vein deposits as one of the important copper ores, especially at Butte, Montana.Geology
William J. Miller
The mineral is harder than chalcocite, but less hard than pyrite, being easily scratched with a knife.
- a lead-grey or black mineral, found as a copper ore or in veins. It is a source of copper. Composition: copper sulphide. Formula: Cu 2 S. Crystal structure: orthorhombic