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object

Onyx

Objects · Colors & materials

A named banded chalcedony used for cameo and intaglio. Not agate as a dump, and not generic stone.

  • Onyx is used in Medicine.

    Pliny’s Natural History treats onyx among banded gems used in seals and related remedy speech. A Roman-era pharmacological use of onyx, not sardonyx as the red-and-white layered neighbor and not agate as the broader chalcedony already walked.

    from Pliny the Elder · Natural History, c. 77 CE

    used in · sourced · documented

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