What does sardonyx mean?
Sardonyx is a banded variety of chalcedony, the fine-grained form of quartz used for gemstones and carved objects. It is best known for layers of contrasting colour, often black or dark brown alternating with white or cream, although other combinations occur. Because of its distinctive striping, it has long been used for jewelry, signet rings, beads, brooches, and decorative vessels. As a material, the word sardonyx is generally used as a mass noun, but individual pieces can be counted as sardonyxes. The term belongs primarily to formal, literary, gemological, and decorative-art contexts rather than everyday speech. Its unusual name reflects an ancient history: the English word derives from Latin and ultimately from Greek, where it was associated both with the gemstone onyx and with Sardis, an ancient city in Lydia renowned for rich mineral resources. Today, sardonyx remains especially valued for the strong visual contrast of its natural bands and for the polished cabochons and cameos made from it.
nounA banded variety of chalcedony, a fine-grained form of quartz, valued as a gemstone and valued for its contrasting layers of colour.
- A banded variety of chalcedony, especially one with contrasting dark and light layers, used as a gemstone and in jewelry.
"The jeweller set a striking black-and-white sardonyx in a silver ring."
"A polished sardonyx was mounted in an antique brooch."
"The sculptor chose sardonyx for its alternating bands of deep brown and creamy white."
Used when referring to individual stones or separate pieces; sardonyx is more commonly a mass noun when referring to the material.
"Collectors paid a premium for unusually vivid sardonyxes."
Its name preserves an ancient association between the precious onyx of Sardis and the Greek word for the stone.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sardonyx come from?
The English word comes through Latin sardonyx from Ancient Greek sardónyx. The Greek form is generally understood as a compound of Sardis, the ancient Lydian city, and onyx, meaning the onyx stone. The related names Sardius and Sardian reflect the same association with Sardis, while onyx is the gem-forming element preserved in the word.
How sardonyx is actually used
Sardonyx is chiefly a formal or specialist term used in gemology, jewelry, lapidary work, and descriptions of decorative arts. As a material it is normally a mass noun, while the plural sardonyxes can refer to individual stones.
Easily confused with sardonyx
Onyx is also a banded variety of chalcedony; sardonyx specifically refers to the gemstone valued for its strongly contrasting, commonly dark-and-light bands.