Onyx (Material)

Looking for Onyx, the planet?

Onyx is a cryptocrystalline form of quartz. Its bands of color range from white to almost any color (save some shades like purple or blue); common colors include white, tan, and brown. Pure black onyx is common, but not as common as the banded variety.

The planet Onyx had such plentiful deposits of onyx that it was named for the mineral.