iron pyrites

American  

noun

1. pyrite; fool's gold.

2. marcasite.

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iron pyrites British  

/ ˈpaɪraɪts /

noun

1. another name for pyrite

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Etymology

Origin of iron pyrites

First recorded in 1795–1805

Example Sentences

A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock.

From Project Gutenberg

These balls are made of small bags or purses of hide, moistened, filled with iron pyrites, or some other heavy substance, and then dried.

From Project Gutenberg

There are two substances which look exceedingly like gold;—copper and iron pyrites, substances familiar to most of us.

From Project Gutenberg

There, close to the boundary of the province of Manila and district of Moron, I found a face of disintegrated quartz glittering with large crystals of iron pyrites.

From Project Gutenberg

Don't you know the difference between gold and iron pyrites yet?

From Project Gutenberg