iron pyrites

noun
1.
pyrite; fool's gold.

Origin:
1795–1805

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World English Dictionary
iron pyrites (ˈpaɪraɪts)
 
n
another name for pyrite

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The ore is mixed with other metalliferous minerals, such as sphalerite, copper pyrites and iron pyrites.
Iron pyrites are usually added to the furnace charge to adjust sulfur content.
Concentrates high in iron pyrites and other iron sulfides have excess sulfur which can result in higher.
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