Onyx
O´nyx
| n. | 1. | (Min.) Chalcedony in parallel layers of different shades of color. It is used for making cameos, the figure being cut in one layer with the next as a ground. | |||
| 2. | Same as | ||||
| 3. | A deep jet-black color.
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| a. | 1. | Deep, jet-black. | |||
| Noun | 1. |  onyx - a chalcedony with alternating black and white bands; used in making cameos |