- a common mineral, iron sulfide, approximately FeS but variable because of a partial absence of ferrous ions, occurring in massive and in crystal forms with a bronze color and metallic luster; magnetic pyrites: generally slightly magnetic.
Origin of pyrrhotite
1868; < Greek pyrrhót(ēs) redness + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pyrrhotite
Pyrrhotite, or magnetic pyrites, is the source of about all the nickel of commerce.
Marcasite and pyrrhotite, other iron sulphide minerals, are frequently found with pyrite and are used for the same purposes.The Economic Aspect of Geology
C. K. Leith
One of the best-known localities is Bodenmais, in Bavaria, where it occurs with pyrrhotite in a granite matrix.
The copper deposits are mainly in well-marked fracture planes in serpentine; the ore is pyrrhotite, with or without chalcopyrite.
The pyritic ores of iron, including marcasite, pyrrhotite and mispickel, are often taken for gold by the inexperienced.
pyrrhotine (ˈpɪrəˌtiːn, -ˌtaɪn, -tɪn)
- a common bronze-coloured magnetic mineral consisting of ferrous sulphide in hexagonal crystalline form. Formula: FeS
C19: from Greek purrhotēs redness, from purrhos fiery, from pur fire