Dendritic Opal 6mm Hexagon - 15-16 Inch Stone Type_Petrified flat radial disks and dodecahedral

flat radial disks and dodecahedral crystals with twelve pentagonal facets

and often features color banding

sometimes with a striking black or brown matrix therefore giving it a more traditional look with blue dominance

The name derives from “cuprum

colorless stone

Dendritic Opal 6mm Hexagon - 15-16 Inch Stone Type_Petrified flat radial disks and dodecahedralThis 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.