pyrrhotite

noun

an iron sulfide mineral

Wiktionary

Pronunciation: /ˈpɪɹətaɪt/

noun

Etymology: Etymology tree Ancient Greek πυρρότης (purrhótēs) Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῑ́της (-ī́tēs)der. Latin -ītēsbor. French -iteder. English -ite English pyrrhotite From Ancient Greek πυρρότης (purrhótēs) + English -ite.

A weakly magnetic ferrous sulfide mineral, FeS.