Answer: girasole

AnswerCrossword Clue
girasole(of a stone) translucent and bluish-white with reddish reflections under strong light; opalescent
girasolesunflower, Helianthus tuberosus, having edible, tuberous, underground stems or rootstocks
girasolea variety of opal, also GIRASOL, GIROSOL
girasoleopal that reflects light in a bright luminous glow