Definify.com
Webster 1913 Edition
Chalcedony
Chal-ced′o-ny
(kăl-sĕd′ō̍-ny̆ or kăl′sē̍-dō̍-ny̆; 277)
, Noun.
pl.
Chalcedonies
(-nĭz)
. [ L.
chalcedonius
, fr. Gr. Χαλκηδών
Chalcedon, a town in Asia Minor, opposite to Byzantium: cf. calcédoine
, OE. calcidoine
, casidoyne
. Cf. Cassidony
.] (Min.)
A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax.
[Written also
calcedony
.] ☞ 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. Webster 1828 Edition
Chalcedony
CHALCEDONY
,Noun.
The varieties of chalcedony are common chalcedony, heliotrope, chrysoprase, plasma, onyx, sard and sardonyx.
Definition 2024
chalcedony
chalcedony
English
Noun
A cut and polished chalcedony geode.
chalcedony (plural chalcedonies)
- A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.
- 2012 March 1, Lee A. Groat, “Gemstones”, in American Scientist, volume 100, number 2, page 128:
- Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)
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Translations
form of fine-grained quartz
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