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.
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
The form of the copper pyrites is shown in Fig.
From Scientific American Supplement, No. 344, August 5, 1882 by Various
Example.—Twenty grams of copper pyrites, known to contain 27.6 per cent. of copper, gave by the method first described 5.22 grams of copper, equalling 26-1/8 per cent.
From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius
The most abundant compound of Cu is chalcopyrite, or copper pyrites, CuFeS2.
From An Introduction to Chemical Science by Williams, Rufus Phillips
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.
