Assertion: pyrrhotite | /r/HasProperty | brunita
Facets:
Source sentences:
text: During a field trip with Aachen University in 1989 we found a lot of samples with sphalerite crystals accompanied by pyrite(or marcasite) after pyrrhotite in an open pit which was active at that time (Brunita?, Jordi may help out, it was not Emilia but more in the east).