くれない銀鉱 ぎんこうではありませんでした
kokurenai ginkōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 濃紅銀鉱

1. Was not a dark red silver ore.; Was not a concentrated red silver mineral.

Past/Perfective
Negative
Polite
Formal Register