玻璃 ぎやまん長石 ちょうせきではありませんでした
giyamanchōsekidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 玻璃長石

1. Was not feldspar glass.; Was not glass feldspar.

Past/Perfective
Negative
Polite
Formal Register