chalcocite
Americannoun
noun
Etymology
Origin of chalcocite
1865–70; irregular chalco- + (anthra)cite
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The production of copper from chalcocite is performed by roasting the Cu2S in air to produce the Cu.
From Textbooks ● Feb. 14, 2019
Orvana has received approval to mine chalcocite, a mineral that is primarily copper, in a project here that the company says will create $2 billion in economic activity over 20 years.
From New York Times ● May 25, 2012
The present tendency at Butte is to consider as secondary chalcocite only certain sooty phases to be found in upper levels.
From The Economic Aspect of Geology by C. K. (Charles Kenneth) Leith
In the easy recognition of the secondary copper sulphides, chalcocite, bornite, etc., the engineer finds a finger-post on the road to extension in depth; and the directions upon this post are not to be disregarded.
From Principles of Mining Valuation, Organization and Administration by Herbert Hoover
Below the oxidized and leached zone there is evidence of deposition of a large amount of secondary copper sulphide in the form of chalcocite.
From The Economic Aspect of Geology by C. K. (Charles Kenneth) Leith
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