sardonyx

/sɑː(ɹ)ˈdɒnɪks/

Etymology

Inherited from Middle English sardonix, sardonyx (c. 1382), from Latin sardonyx, from Ancient Greek σᾰρδόνῠξ (sărdónŭx). Doublet of sardoin.

Why this word is great

SARDONYX — Noun. A banded gemstone where layers of fiery sard (reddish chalcedony) alternate with cool onyx, creating a striated dance of warmth and depth. From Middle English *sardonix*, borrowed from Latin *sardonyx*, itself from Ancient Greek *σᾰρδόνῠξ (sardónux)*—a fusion of *sardios* (Sardian stone) and *onyx* (claw, nail, for its layered hardness). Unlike carnelian’s uniform glow or onyx’s stark monochrome, sardonyx marries the two: terra-cotta rivers frozen between obsidian banks. Roman artisans carved it into cameos to immortalize profiles; Byzantine emperors sealed decrees with its polished face. A single cabochon holds epochs—iron’s blush, silica’s patience, the slow alchemy of pressure and time whispering through its bands.

noun

  1. A gemstone having bands of red sard; a variety of onyx or chalcedony.“The fifth, sardonyx; the sixth, sardius; the seventh, chrysolyte; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst.”