Pyrrhotite
[pir-uh-tahyt] /ˈpɪr əˌtaɪt/
noun
1.
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.
/ˈpɪrəˌtaɪt/
noun
1.
a common bronze-coloured magnetic mineral consisting of ferrous sulphide in hexagonal crystalline form. Formula: FeS
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