Onyx is a variety of chalcedony. Onyx comes in brown, white, gray and black. It has straight bands of brown, white or black.
Onyx is the mystical stone for December.
Luster: vitreous | Hardness: 6.5-7 | Density: 2.6
Legends & Lore:
- Black onyx is believed to help one change habits.
- Mexican Onyx (white and brown) is said to help one sleep.