4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise in a variety of swirling

in a variety of swirling and linear patterns

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

is a lab-made form of zirconium dioxide

milky to pink silicon dioxide mineral

Phillipine Rosewood

4x6 mm Dendritic Opal Table Cut Corner Drilled Cube - 15-16 Inch birthstone_turquoise in a variety of swirlingThis 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.