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Sardonyx

/ˈsɑːrdənɪks/noun

A banded stone of red-brown sard alternating with white onyx layers.

The Greek roots

σάρδιον
sárdion
sard, red-brown stone
+
ὄνυξ
ónyx
fingernail

Literally: sard with a fingernail band

The story of the word

Two stones in one name: sard, a red-brown chalcedony probably called after Sardis in Lydia, layered with onyx. ὄνυξ means fingernail, and the pale banded stone was thought to look like a nail held up to the light. Roman engravers prized sardonyx for cameos, because the layers let a white figure be carved out of a dark ground in one piece.

How it travelled
Ancient Greek → Latin → English
First recorded
14th century

Same family

onyxchalcedonyparonychia

In a sentence

The cameo is sardonyx, the head white against a brown field.

Built on the same root

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