Webster's Revised Unabridged Dictionary · 1913

Pyrites

Pyrites , noun

[Latin, from Greek {not transcribed}, from {not transcribed} fire. See Pyre.]

(Mineralogy) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.

The term was originally applied to the mineral pyrite, or iron pyrites, in allusion to its giving sparks when struck with steel.

Collocations (10)
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 or Copper pyrites , the sulphide of copper and iron; chalcopyrite.