うろこ鉄鉱 てっこうではありませんでした
urokotekkōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 鱗鉄鉱

1. Was not pyrrhotite.; Was not a pyrrhotite.

Past/Perfective
Negative
Polite
Formal Register