赤白 あかしろ珪石 けいせきではありませんでした
akashiro keisekidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 赤白珪石

1. Was not red and white pebbles.; Was not a red-and-white stone.

Past/Perfective
Negative
Polite
Formal Register