Madagascar Dendiritc Green Opal 6mm Round A Grade - 15-16 Inch FEATURE04142022 meaning it forms by replacing

meaning it forms by replacing another mineral’s crystal structure atom by atom with its own crystal structure

The different colored zones in the stone result from different oxidation states of iron

lepidocrocite

Pull wire through closed jaws of the Nylon Jaw Pliers to correct and straighten

Madagascar Dendiritc Green Opal 6mm Round A Grade - 15-16 Inch FEATURE04142022 meaning it forms by replacingThis variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, manganese and other metallic oxides captured during the forming of the rock. Opals are hydrated amorphous forms of silica, created when silica hardens within the fissures of other stones.