A milky or greyish translucent to transparent quartz.

synonym: calcedony.

Roget 847a: jewel [general], , jewelry, jewellery^†; bijoutry^†; bijou, bijouterie [Fr.]; trinket; fine jewelry; costume jewelry, junk jewelry; gem, gemstone, precious stone.    [forms of jewelry: list] necklace, bracelet, anklet; earring; locket, pendant, charm bracelet; ring, pinky ring; carcanet^†; chain, chatelaine; broach, pin, lapel pin, torque.    [gemstones: list] diamond, brilliant, rock [Coll.]; beryl, emerald; chalcedony, agate, heliotrope; girasol^†, girasole^†; onyx, plasma; sard^†, sardonyx; garnet, lapis lazuli, opal, peridot, tourmaline, chrysolite; sapphire, ruby, synthetic ruby; spinel, spinelle; balais^†; oriental, oriental topaz; turquois^†, turquoise; zircon, cubic zirconia; jacinth, hyacinth, carbuncle, amethyst; alexandrite^†, cat's eye, bloodstone, hematite, jasper, moonstone, sunstone^†.    [jewelry materials derived from living organisms] pearl, cultured pearl, fresh-water pearl; mother of pearl; coral.    [person who sells jewels] jeweler.    [person who studies gemstones] gemologist; minerologist.    [person who cuts gemstones] lapidary, lapidarian.    [study of gemstones] gemology, gemmology; minerology.    ... show more

Dutch: chalcedoon, chalcedon
Polish: chalcedon