Onyx

Color and banding Vary widely Hardness 6.5 Transparency Translucent to opaque Lustre Waxy Fracture Conchoidal Onyx Onyx is a type of chalcedony, which is a microcrystalline form of quartz. It is a banded variety of chalcedony that forms in concentric layers of different colors. Onyx typically has a black base with white or colored bands. The colored […]