Japanese edit

 
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オパール

Etymology edit

Borrowed from French opal.[1]

Noun edit

オパール (opāru

  1. (mineralogy) opal, a mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity

References edit

  1. ^ Matsumura, Akira (1995) 大辞泉 [Daijisen] (in Japanese), First edition, Tōkyō: Shogakukan, →ISBN