Black Onyx Round High-Dome Cabochon

This round high-dome black onyx cabochon is a great choice for adding depth and drama to custom jewelry designs. Use it to create a simple, single-gemstone pendant or ring, or combine it with gems of complementary colors for multi-gem designs. Premium high-dome cabochons are much more substantial and increase the profile of the gemstone in your design. Onyx, a type of opaque chalcedony, is naturally black and is generally dyed to achieve a more uniform color—it is the most common black gemstone and is popular for creating a striking centerpiece and for adding contrast to designs that include lighter and/or more colorful gems. It is a hard gemstone and takes a high polish; since ancient times, onyx has been a favorite for carving.