iron pyrites

noun

pyrite; fool's gold.
marcasite.

Origin of iron pyrites

First recorded in 1795–1805

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for iron pyrites

Historical Examples of iron pyrites

Analyses usually, however, show the presence of more iron, owing to the intimate admixture of iron-pyrites.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3
Various

British Dictionary definitions for iron pyrites

iron pyrites

noun

another name for pyrite

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012