chalcedony
noun/kælˈsɛd.ə.ni/ · /ˈkæl.səˌdoʊ.ni/
Etymology Borrowed from Latin chalcēdōnius, from Ancient Greek χαλκηδόνιος (khalkēdónios), from Ancient Greek χαλκηδών (khalkēdṓn), cognate to Arabic كَرْكَنْد (karkand).
1
A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.
- 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.)2012 March 23, Lee A. Groat, “Gemstones”, in American Scientist, volume 100, number 2, archived from the original on 14 Jun 2012, page 128:
- Synonyms
- chalcedonite
- Derived terms
- chalcedoneous, chalcedonic