girosol

/ˈdʒaɪrəˌsɔl/
noun
  1. A type of opal that shows a floating, bluish or reddish glow when turned in the light.
    • She admired the shifting colors of the girosol as she rotated it in her hand.
    • Girosol opals are prized for their unique play of light.
    • The jeweler displayed a beautiful girosol in a simple silver ring.
Synonyms