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 Egg - 285 grams
Weight: 285 grams
Measurements: H 78 mm - W 57mm - D 57mm