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The Collaborative International Dictionary of English v.0.48 (gcide)

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.
[1913 Webster]

Hence sable coal his massy couch extends,
And stars of gold the sparkling pyrite blends. --E.
Darwin.
[1913 Webster]


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.
[1913 Webster]

Note: The term was originally applied to the mineral pyrite,
or iron pyrites, in allusion to its giving sparks when
struck with steel.
[1913 Webster]

{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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