4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise is a lab-made form of

is a lab-made form of zirconium dioxide

This stone is composed of angular fragments of minerals

These druzy collars are part of a hand-picked collection unlike anything we'd seen available before

in a variety of swirling and linear patterns

4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise is a lab-made form ofThis 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.