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chalcedony in British English
(kælˈsɛdənɪ) or calcedony
nounWord forms: plural -nies
a microcrystalline often greyish form of quartz with crystals arranged in parallel fibres: a gemstone. Formula: SiO2
Derived forms
chalcedonic (ˌkælsɪˈdɒnɪk) adjective
Word origin
C15: from Late Latin chalcēdōnius, from Greek khalkēdōn a precious stone (Revelation 21:19), perhaps named after Khalkēdōn Chalcedon, town in Asia Minorchalcedony in American English
(kælˈsɛdəni; ˈkælsəˌdoʊni)
nounWord forms: plural chalˈcedonies
a type of quartz with a waxy luster and microscopic crystals often forming colorful, parallel bands
Word origin
ME & OFr calcedoine < LL (Vulg.) calcedonius, used to transl. Gr chalkēdōn (only in Rev. 21:19), a precious stone < ?Image ofchalcedony
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