Onyx
Onyx is a natural semi-precious stone, a variation of chalcedony and part of the group of quartz. The stone has extra rigidity and zero water absorption, high transmittance of light and because of that onyx becomes the most preferred and likeable stone in modern design and original architecture. With its rich variety of colors and veins, which can be from white to almost every color and tint, Onyx is widely used in jewelry.