蛋たん白ぱく石せき

noun

opal

Mineralogy term for the gemstone opal. Often referred to by the loanword オパール in everyday contexts.

See also: オパール

• 蛋たん白ぱく石せきは虹にじ色いろの輝かがやきを持もつ宝ほう石せきです。

  Opal is a gemstone with iridescent brilliance.