かがやき蒼鉛 そうえん こうではありませんでした
kagayakisō enkōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 輝蒼鉛鉱

1. Was not a shining blue lead ore.

Past/Perfective
Negative
Polite
Formal Register
Geology