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object

Sard

Objects · Colors & materials

A named brown-red chalcedony of biblical sardius and later seal-cutting. Not carnelian as identity, and not onyx.

Also known as Sardius

  • Sard is used in Medicine.

    Pliny’s Natural History treats sard among red chalcedony gems neighboring carnelian in seal and remedy speech. A Roman-era pharmacological use of sard, not carnelian as the already-walked red chalcedony and not sardonyx as the layered form.

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

    used in · sourced · documented

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