In mineralogy terms the difference between pyrrhotite and troilite
is that pyrrhotite is a weakly magnetic ferrous sulfide mineral, FeS while troilite is a non-magnetic variety of the ferrous sulfide mineral pyrrhotite that occurs in most meteorites.
pyrrhotite
Noun
(en-noun)
(mineralogy) A weakly magnetic ferrous sulfide mineral, Fe]][[sulfur, S.
Synonyms
* magnetic pyrites
troilite
English
Noun
(
en noun)
(mineralogy) A non-magnetic variety of the ferrous sulfide mineral pyrrhotite that occurs in most meteorites