CHALCEDONY

chalcedony, calcedony

(noun) a milky or greyish translucent to transparent quartz

Source: WordNet® 3.1


Etymology

Noun

chalcedony (countable and uncountable, plural chalcedonies)

A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.

Source: Wiktionary


Chal*ced"o*ny, n.; pl. Chalcedonies. Etym: [ L. chalcedonius, fr. Gr. calcédoine, OE. calcidoine, casidoyne. Cf. Cassidony.] (Min.)

Definition: A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax. [Written also calcedony.]

Note: When chalcedony is variegated with with spots or figures, or arranged in differently colored layers, it is called agate; and if by reason of the thickness, color, and arrangement of the layers it is suitable for being carved into cameos, it is called onyx. Chrysoprase is green chalcedony; carnelian, a flesh red, and sard, a brownish red variety.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

17 May 2025

ANTHOZOAN

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