pyrite

[ pahy-rahyt ]

noun

1. a very common brass-yellow mineral, iron disulfide, FeS 2 , with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid: chemically similar to marcasite, but crystallizing in the isometric system.

pyrite

/ paɪˈrɪtɪk; ˈpaɪraɪt /

noun

1. a yellow mineral, found in igneous and metamorphic rocks and in veins. It is a source of sulphur and is used in the manufacture of sulphuric acid. Composition: iron sulphide. Formula: FeS 2 . Crystal structure: cubic Also callediron pyritespyrites Nontechnical namefool's gold

pyrite

/ pī′rīt′ /

1. 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: FeS 2 .

Derived Forms

• pyritic, adjective

Other Words From

• py·rit·ic [pahy-, rit, -ik, p, uh, -], py·riti·cal py·ri·tous [p, uh, -, rahy, -t, uh, s, pahy-], adjective

Word History and Origins

Origin of pyrite¹

1560–70; < Latin pyrītēs < Greek pyrī́tēs, noun use of adj.: of fire, so called because it produces sparks when struck. See pyr-, -ite ¹

Word History and Origins

Origin of pyrite¹

C16: from Latin pyrites flint, from Greek puritēs ( lithos ) fire (stone), that is, capable of withstanding or striking fire, from pur fire

Example Sentences

They examined the relationship between the mixing of sediment caused, in part, by digging worms with a mineral called pyrite, which plays a key role in oxygen buildup.

From Science Daily

Christen Rensing, a reader who lives in Malibu, says the book was an impetus for him to move to California, despite the “pyrite promise” of Hollywood.

From New York Times

Shiny iron sulfide, familiar to many Coloradans as fool's gold, or pyrite, is the most common of these sulfide minerals, but copper, zinc and other metal sulfides are also common.

From Science Daily

They also found about 40 obsidian objects, more than 10,000 marine shell beads, ceramic ornaments, pyrite, and a pendant made of a mammal’s teeth.

From Science Magazine

The team found plenty of lithium in pyrite minerals in shale, Bhattacharya said, "which is unheard of."

From Science Daily