Onyx

Typically black, but can also come in a variety of colors including white, brown, and green. The most famous type is black onyx, which often has a deep, rich black color. Onyx is often banded or striped. The bands can be parallel or curved and vary in color. The banding is usually more prominent in agate, a type of onyx. Has a smooth, glossy luster when polished, giving it a sleek, sophisticated appearance. On the Mohs scale, onyx ranks between 6 and 7, making it relatively durable but not as hard as some other gemstones. Popular in jewelry such as rings, earrings, and pendants. It is also used for decorative items and carvings.