chalcocite

How to use chalcocite in a sentence

• 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 ore chalcocite, sometimes called copper glance, has a metallic luster, often tarnished green or blue.

  Birds and all Nature Vol VII, No. 3, March 1900 | Various

• Both chalcocite and chalcopyrite frequently occur in silver-bearing rocks.

  Birds and all Nature Vol VII, No. 3, March 1900 | Various

• The mineral is harder than chalcocite, but less hard than pyrite, being easily scratched with a knife.

  Birds and all Nature Vol VII, No. 3, March 1900 | Various