Definitions for: Chalcedony


[n] a milky or grayish translucent to transparent quartz



Webster (1913) Definition: Chal*ced"o*ny (k[a^]l*s[e^]d"[-o]*n[y^] or
k[a^]l"s[-e]*d[-o]*n[y^]; 277), n.; pl. Chalcedonies
(-n[i^]z). [ L. chalcedonius, fr. Gr. CHalkhdw`n Chalcedon, a
town in Asia Minor, opposite to Byzantium: cf. calc['e]doine,
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.]

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.

Synonyms: calcedony

See Also: agate, bloodstone, carnelian, chrysoprase, cornelian, heliotrope, onyx, plasma, quartz, sard, sardine, sardius, transparent gem

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