珪酸 けいさん 鉛鉱 えんこうじゃなかったです
keisan'aenkōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 珪酸亜鉛鉱

1. It wasn't smithsonite.

Past/Perfective
Negative
Polite
Casual Register
Mineralogy