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.
Quartz, containing disseminated hematitic iron-ore and copper pyrites.
From Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 by King, Phillip Parker
If it contains more than 55% of copper it is directly refined, while if it contains a lower percentage it is smelted with matte or calcined copper pyrites.
From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" by Various
In one case, where the fissure is partially filled up with silica inclosing iron and copper pyrites, gold has also been found in the vein-stone.
From The Student's Elements of Geology by Lyell, Charles, Sir
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
If the quartz has much iron or copper pyrites, the sluice is used to collect this material and save it for separation at some future time.
From Hittel on Gold Mines and Mining by Hittell, John S. (John Shertzer)
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
