4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise milky to pink silicon dioxide

milky to pink silicon dioxide mineral

is a lab-made form of zirconium dioxide

in a variety of swirling and linear patterns

It won 1st price and has been used ever since in sculpture

Ocean Jasper is a commercial name for Orbicular Jasper

4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise milky to pink silicon dioxideThis 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.