Onyx and Sable

Onyx noun - A chalcedony with alternating black and white bands; used in making cameos.

Sable and onyx are semantically related in black topic. In some cases you can use "Sable" instead an adjective "Onyx", when it comes to topics like colors.

Sable adjective - Having the color of soot or coal.

Onyx and sable are semantically related in colors topic. You can use "Onyx" instead an adjective "Sable".