Chalcocite (/ ˈ k æ l k ə ˌ s aɪ t /), [6] [7] copper(I) sulfide (Cu 2 S), is an important copper ore mineral. It is opaque and dark gray to black, with a metallic luster. It has a hardness of 2.5–3 on the Mohs scale. It is a sulfide with a monoclinic crystal system. The term chalcocite from the Greek khalkos, meaning "copper".

Chalcocite-Yarrowite Series. A secondary mineral in or near the oxidized zone of copper sulfide deposits. Hexagonal above 105°C ('High-chalcocite'). Easily confused with djurleite. Chalcocite easily converts to djurleite under the electron beam through the rearrangement of Cu atoms (Pósfai and Buseck, 1994).

chalcocite, sulfide mineral that is one of the most important ores of copper. Valuable occurrences include deposits of sulfide minerals at Ely, Nev., and Morenci, Ariz., where other components of the original rock have been dissolved away; it is also found with bornite in the sulfide veins of Tsumeb, Namibia, and Butte, Mont.

Detailed properties and locality information guide about the copper ore mineral chalcocite: bristol, cornwall.

Chalcocite is a supergene mineral that crystallizes in the orthorhombic system. It is a dark gray to black mineral with a metallic luster and has a relatively high specific gravity of 5.5-5.8. Chalcocite is typically soft, with a Mohs hardness of about 2.5-3. Key Properties of Chalcocite. Chemical Formula Cu₂S . Crystal System Orthorhombic

Dec 1, 2024 · Chalcocite is a fascinating mineral with a rich history and unique properties. Known for its metallic luster and dark gray to black color, this mineral has intrigued scientists and collectors alike. Chalcocite is a copper sulfide mineral with the chemical formula Cu₂S.

Secondary mineral in or near the oxidized zone of copper sulfide deposits. Cornwall, England and Butte, Montana. Link to MinDat.org Location Data. From the Greek, meaning chalkos, "copper". Comments: Chalcocite crystals in this specimen vary in size up to 1.2 cm across. Location: Bristol nr. Hartford, Connecticut, USA. Scale: 7.6 x 4 cm.

Chalcocite is one of those crystals worth checking out! Imagine it’s like a magical color-changing treasure, shifting between deep indigo and shiny black. It is a copper sulfide mineral, a mix of copper and sulfur atoms that create a crystal with a metallic sheen. Speaking of history, Chalcocite has been present for a long time.

Chalcocite is an important ore of copper and a secondary mineral in or near the oxidized zone of copper sulfide deposits. It has been mined for centuries and is one of the most profitable copper ores because of its high copper content (nearly 80% by weight) and the ease at …

Chalcocite is an important copper mineral ore. It has been mined for centuries and is one of the most profitable copper ores. The reasons for this is its high copper content (67% atomic ratio and nearly 80% by weight) and the ease at which copper can be separated from sulfur.