珪酸 けいさん 鉛鉱 えんこうではありませんでした
keisan'aenkōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 珪酸亜鉛鉱

1. Was not zinc silicate.; Was not zinc silicate ore.

Past/Perfective
Negative
Polite
Formal Register
Mineralogy