Definition of chalcedony in English:

chalcedony

Line breaks: chal|ced¦ony
Pronunciation: /kalˈsɛdəni
 
/

noun (plural chalcedonies)

[mass noun]
  • A microcrystalline type of quartz occurring in several different forms including onyx and agate.
    More example sentences
    • Common cements include clay minerals such as kaolinite, montmorillonite, or illite; quartz or chalcedony; iron oxides such as haematite; or calcite.
    • Vein minerals are barite, calcite, chalcedony, and quartz.
    • The shoots and stalks themselves are casts composed of combinations of chalcedony, quartz, calcite, and barite.

Derivatives

chalcedonic

Pronunciation: /ˌkalsɪˈdɒnɪk/
adjective
More example sentences
  • The Main vein is 7-8 feet thick, extends for 300 feet along strike, and consists of chalcedonic quartz.
  • There is no chalcedonic quartz anywhere within or on the specimen.
  • The formation is composed largely of dark limestone and dolomite, and contains black chalcedonic chert in fine laminated layers, a piece of which is displayed near the bottom of this page.

Origin

late Middle English: from Latin calcedonius, chalcedonius (often believed to mean 'stone of Chalcedon', but this is doubtful), from Greek khalkēdōn.

More definitions of chalcedony

Definition of chalcedony in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day kerf
Pronunciation: kəːf
noun
a slit made by cutting with a saw