るりかいじゃなかったです
瑠璃貝じゃなかったです
rurikaijanakattadesu

Noun
Desu Copula

The polite, past negative form of るりがい

1. It wasn't mother-of-pearl.; It wasn't lapis lazuli shell.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana