chalcedony

== English == === Etymology === Borrowed from Latin chalcēdōnius, from Ancient Greek χαλκηδόνιος (khalkēdónios), from Ancient Greek χαλκηδών (khalkēdṓn), cognate to Arabic كَرْكَنْد (karkand). === Pronunciation === IPA(key): /kælˈsɛd.ə.ni/, /ˈkæl.səˌdoʊ.ni/ === Noun === chalcedony (countable and uncountable, plural chalcedonies) A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally. ==== Synonyms ==== chalcedonite ==== Derived terms ==== ==== Related terms ==== calcedon ==== Translations ==== ==== See also ==== (noun: types of minerals) agate, chert, flint, moganite (adjective) conchoidal (adverb) conchoidally (noun) break, fracture, flake, shatter (verb) knapp, break, fracture, flake, shatter === Further reading === David Barthelmy (1997–2026), “Chalcedony”, in Webmineral Mineralogy Database. “chalcedony”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.