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chalcocite
[ kal-kuh-sahyt ]
noun
- a common mineral, cuprous sulfide, Cu 2 S: an important ore of copper.
chalcocite
/ ˈkælkəˌsaɪt /
noun
- 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
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Word History and Origins
Origin of chalcocite1
1865–70; irregular chalco- + (anthra)cite
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Word History and Origins
Origin of chalcocite1
C19: changed from earlier chalcosine, from Greek khalkos copper + -ite 1
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Example Sentences
Copper pyrites (or yellow ore), erubescite (or purple ore), and chalcocite (or grey ore) are the most important.
From Project Gutenberg
Chalcocite occurs in vein deposits as one of the important copper ores, especially at Butte, Montana.
From Project Gutenberg
The ore chalcocite, sometimes called copper glance, has a metallic luster, often tarnished green or blue.
From Project Gutenberg
Both chalcocite and chalcopyrite frequently occur in silver-bearing rocks.
From Project Gutenberg
The mineral is harder than chalcocite, but less hard than pyrite, being easily scratched with a knife.
From Project Gutenberg
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