a type of quartz with a waxy luster and microscopic crystals often forming colorful, parallel bands
Origin: Middle English and amp; Old French calcedoine ; from Late Latin (Vulg.) calcedonius, used to translated, translation Classical Greek chalkēdōn (only in Revelation 21:19), a precious stone ; from uncertain or unknown; perhaps
A type of quartz that has a waxy luster and varies from transparent to translucent. It is usually white, pale-blue, gray, brown, or black and is often found as a lining in cavities. Agate, flint, and onyx are forms of chalcedony. Chemical formula:SiO2.