Pyrite \Pyr"ite\, n.; pl. Pyrites. [Cf. F. pyrite. See
Pyrites.] (Min.)
A common mineral of a pale brass-yellow color and brilliant
metallic luster, crystallizing in the isometric system; iron
pyrites; iron disulphide.
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Hence sable coal his massy couch extends,
And stars of gold the sparkling pyrite blends. --E.
Darwin.
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Pyrites \Py*ri"tes\, n. [L., fr. Gr. ?, fr. ? fire. See Pyre.]
(Min.)
A name given to a number of metallic minerals, sulphides of
iron, copper, cobalt, nickel, and tin, of a white or
yellowish color.
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Note: The term was originally applied to the mineral pyrite,
or iron pyrites, in allusion to its giving sparks when
struck with steel.
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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.
[1913 Webster] Pyritic
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