Pyrites is a yellow brass mineral with a bright metallic luster also known as fool’s gold. It is a common compound of sulfide mineral. Pyrite’s chemical composition is iron sulfide (FeS2). It is found ...

PYRITES (FeS 2) in the form of small crystals and specks of a brassy-yellow colour may be found frequently in quartz. Four pieces of Brazilian quartz, containing pyrites inclusions, have now been ...

IN NATURE, vol. xi. p. 249, Mr. Carr mentions the fact that some iron pyrites in the Maidstone Museum “have crumbled into a coarse, finely divided mass;” and he inquires whether “such a thing has ever ...

(n.) A common mineral of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system; iron pyrites; iron disulphide. Dictionary is an essential part of individual ...