Wholesale Onyx semi-precious gemstone beads and pendants. Onyx is a semiprecious variety of chalcedony. When chalcedony is variegated with spots or figures, or arranged in differently colored layers, it is called agate. Black Onyx can appear opaque or translucent. Although it occurs naturally in black, it is generally dyed black to improve its color. Click each thumbnail image for product details & tiered pricing. |