4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise Ocean Jasper is a commercial

Ocean Jasper is a commercial name for Orbicular Jasper

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

although sometimes mistaken for Jasper

This stone is composed of angular fragments of minerals

4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise Ocean Jasper is a commercialThis 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.