りゅう砒鉄鉱 てっこうじゃないです
ryūtekkōjanaidesu

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 硫砒鉄鉱

1. It's not pyrite.; It's not arsenopyrite.; It's not iron pyrite.

Negative
Polite
Casual Register
Geology