Chalcedony
//kælˈsɛd.ə.ni// noun
noun ·Uncommon ·Advanced level
Definitions
Noun
- 1 A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally. countable, uncountable
"Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)"
- 2 a milky or greyish translucent to transparent quartz wordnet
Example
More examples"My mother gave me a necklace made of beautiful blue chalcedony stones."
Etymology
Borrowed from Latin chalcēdōnius, from Ancient Greek χαλκηδόνιος (khalkēdónios), from Ancient Greek χαλκηδών (khalkēdṓn), cognate to Arabic كَرْكَنْد (karkand).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.