Rockshop Opal Pink Polished Tumblestone 30-40mm
The mineraloid Opal is amorphous hydrated silicon dioxide. Opal contains water in its structure sometimes as much as 20%. Opal ranges from colourless through white milky blue grey red pink yellow green brown and black. About 95% of the World's Opal comes from Sothern Australia though some pink opal is from Peru.