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Entry 1 sense Webster, 1913

Pyrites

· Py·ri·tes · IPA
01 n. A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.
  1. 1.
    A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.(Min.)
Phrases & compounds
Arsenical pyrites — arsenopyrite.
Auriferous pyrites — See under Auriferous.
Capillary pyrites — millerite.
Common pyrites — isometric iron disulphide; pyrite.
Hair pyrites — millerite.
Iron pyrites — See Pyrite.
Magnetic pyrites — pyrrhotite.
Tin pyrites — stannite.
White iron pyrites — orthorhombic iron disulphide; marcasite. This includes cockscomb pyrites (a variety of marcasite, named in allusion to its form), spear pyrites, etc.
Yellow pyrites — the sulphide of copper and iron; chalcopyrite.