A shiny yellow mineral consisting of iron disulphide and typically occurring as intersecting cubic crystals.See also copper pyrites
- ‘The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite.’
- ‘Chalcopyrite is occasionally found in the manto orebodies as small crystals on sphalerite and pyrite.’
- ‘In terms of finance alone, last night was the difference between digging gold or iron pyrites.’
- ‘The mordenite is associated with a hemispherical form of pale yellow calcite and cubic pyrite.’
- ‘Many conclude that because pyrite is cubic, pyrrhotite must be hexagonal, as it often appears.’
Late Middle English (denoting a mineral used for kindling fire): via Latin from Greek puritēs ‘of fire’, from pur ‘fire’.
We take a look at several popular, though confusing, punctuation marks.