pyrite, pī′rīt, n. native iron disulphide of a pale-yellow colour and very hard—also Iron pyrites.
The principal use of pyrite is in the manufacture of sulphuric acid.
The deposition of galena, blende, and pyrite in the Galena lead mines still continues.
Wherever flint and pyrite are to be had these are used for striking fire.
A few small crystals of pyrite were then placed in the bottle of solution, and the gold began immediately to precipitate on them.
He, however, puts it on one side as merely a synonym for pyrite, nor can it be satisfactorily defined in much better terms.
Marcasite and pyrrhotite, other iron sulphide minerals, are frequently found with pyrite and are used for the same purposes.
pyrite, the yellow iron sulphide, is the commonest and most abundant of the metallic sulphides.
Before the war domestic sources supplied a fourth to a third of the domestic demand for pyrite.
The most common petrifying materials are calcite, silica, and pyrite (p. 13).
"metallic iron disulfide, fool's gold," 1550s, from Old French pyrite (12c.), from Latin pyrites, from Greek pyrites lithos "stone of fire, flint" (so called because it glitters), from pyrites "of or in fire," from pyr (genitive pyros) "fire" (see fire (n.)). Related: Pyritic.
A silver to yellow, metallic, cubic mineral. Pyrite often crystallizes in cubes or octahedrons but also occurs as shapeless masses of grains. It occurs in most types of rocks, and is used as a source of iron and in making sulfur dioxide. It is a polymorph of marcasite. Because of its shiny look and often yellow color, it is sometimes mistaken for gold and for this reason is also called fool's gold. Chemical formula: FeS2.