Green Opal is a common Opal and is formed from a solution of silicon dioxide and water. As water runs down carries this silica-rich solution into cracks and voids. through the earth, it picks up silica from sandstone, and as the water evaporates, it leaves behind a silica deposit
Green Opal Sphere - 765 grams
April Sale
Weight: 765 grams
Measurements: H 84 mm - W 84mm - D 84mm