Material Name: chalcocite
Description
A mineral composed of cuprous sulfide. Chalcocite occurs in conjunction with other copper ores. It is a dark gray color with a bluish-green tarnish. Chalcocite is an important source for copper and is mined in Chile, Mexico, Nambia, England (Cornwall), Romania, the Ural Mountains and the U.S. (Montana, Arizona, Utah, Nevada, Alaska, Connecticut, New Mexico).

Synonyms and Related Terms
copper glance; cuprous sulfide; calcosita (Esp.); calcocite (Port.); Kupferglanz, Chalcocit (Deut.); chalcosiet (Ned.)

CompositionCu2S
Mohs Hardness2.5 - 3.0
Density5.5-5.8

Other Properties
Orthorhombic crystal system. Fracture = conchoidal; brittle. Cleavage = poor in one direction. Luster = metallic Streak = gray to black

Additional Information
Mineralogy Database: Chalcocite


Images
2 total images

Chalcocite

Chalcocite (copper sulfide).
Image credit: Minerals and Materials Photo Gallery.
Image accessed Oct.30, 2004 at Minerals in Your World
 
Chalcocite

Image credit: http://www.barlowminerals.com/ChalcociteXL.jpg
(Image accessed April 24, 2004)
 

Authority

6 total authority records

Henry Hodges, Artifacts: An Introduction to Early Materials and Technology, Ronald P. Frye, Kingston, Canada, 1988

Encyclopedia Britannica, http://www.britannica.com

comments: "chalcocite" Encyclopædia Britannica [Accessed December 11, 2001].

C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979

Materials Handbook, G.S. Brady, McGraw-Hill Book Co., New York, 1971

comments: p. 232

Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985

Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

Last updated on: 7/6/2009 8:03:51 AM


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