copper pyrites
Americannoun
noun
Etymology
Origin of copper pyrites
First recorded in 1770–80
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 form of the copper pyrites is shown in Fig.
From Scientific American Supplement, No. 344, August 5, 1882 by Various
This is because I have assumed in the calculations that the grains of copper pyrites, for example, were all copper pyrites and the particles of gangue were free from copper.
From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius
The floor of the cavern was covered with heaps of water-worn fragments of quartzoze rock containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony.
From The History of Australian Exploration from 1788 to 1888 by Favenc, Ernest
Some copper pyrites appear among these veins accompanied, it is said, by silvery-grey copper.
From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 by Humboldt, Alexander von
The floor of the cavern was covered with heaps of water-worn fragments of quartzose rock, containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony.
From Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 1 by King, Phillip Parker
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
