硫酸 りゅうさん鉛鉱 えんこうじゃないです
ryūsan'enkōjanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 硫酸鉛鉱

1. It's not galena.; It isn't lead sulfide.

Negative
Polite
Casual Register
Mineralogy