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.
Black above, the Mimic Geotrupes is the colour of copper pyrites below; also black in all parts exposed to the light of day, the Stercoraceous Geotrupes displays a ventral surface of a glorious amethyst violet.
From The Glow-Worm and Other Beetles by Teixeira de Mattos, Alexander
The most abundant compound of Cu is chalcopyrite, or copper pyrites, CuFeS2.
From An Introduction to Chemical Science by Williams, Rufus Phillips
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
Beat with a stone on copper pyrites, and it immediately begins to crumble.
From Harper's New Monthly Magazine Vol. IV, No. 19, Dec 1851 by Various
Calcination is only advisable for ores which contain relatively much iron pyrites and little copper pyrites.
From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" by Various
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.
