Roger Weller, geology instructor
email@example.com copyright 2012-R.Weller
Quilpie, Queensland, Australia
Hydrophane is a rare form of fire opal that is white while dry, but turns to brilliant
colors when soaked in water. After it dries, it turns white again.
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.