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Showing results for chalcedony. Search instead for calcedony.

chalcedony

American  
[kal-sed-n-ee, kal-suh-doh-nee] / kælˈsɛd n i, ˈkæl səˌdoʊ ni /

noun

chalcedonies plural
  1. a microcrystalline, translucent variety of quartz, often milky or grayish.


chalcedony British  
/ kælˈsɛdənɪ, ˌkælsɪˈdɒnɪk /

noun

  1. a microcrystalline often greyish form of quartz with crystals arranged in parallel fibres: a gemstone. Formula: SiO 2

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

chalcedony Scientific  
/ kăl-sĕdn-ē /
  1. A type of quartz that has a waxy luster and varies from transparent to translucent. It is usually white, pale-blue, gray, brown, or black and is often found as a lining in cavities. Agate, flint, and onyx are forms of chalcedony. Chemical formula: SiO 2 .


Other Word Forms

Derived Forms

Inflected Forms

Nouns

Etymology

Origin of chalcedony

First recorded in 1275–1325; Middle English calcedonie, from Late Latin chalcēdōnius (Vulgate, Revelation 21:19), equivalent to chalcēdōn- (from Greek chalkēdṓn “chalcedony,” identified by Saint Jerome with Chalcedon, the city) + -ius adjective suffix; see -ious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Encased in blue chalcedony, set with diamonds and hung from a black silk ribbon, the piece is a contemporary interpretation of Baillères’ Mexican heritage.

From Los Angeles Times Apr. 9, 2026

Watts gleamed in jewels, pairing her pavé diamond rings with a dazzler of a sapphire, diamond and chalcedony necklace.

From Los Angeles Times Feb. 19, 2015

The subtle color mixes included lilac diamonds with lavender chalcedony, purple sapphires and pink spinels.

From New York Times Jul. 4, 2011

The National Museum of the American Indian displays about 100 Pepper artifacts near the fourth-floor elevator entrance, mostly jasper and chalcedony blades that date back as far as 10,000 B.C.

From New York Times Jul. 22, 2010

With any luck, the territory would contain flint, jasper, or chalcedony, the raw material for spear points, meat scrapers, and other hunting tools.

From "1491" by Charles C. Mann

It is overrun with vines and 159 flowers, cut in stone, and set with onyx and jasper and lapis lazuli, carnelians and turquoises, and chalcedonies and sapphires.

From From Egypt to Japan by Field, Henry M. (Henry Martyn)

She had filled her pockets with specimens of obsidian, jaspers, and chalcedonies, of colors most beautiful, with a deep-dyed opaqueness, a shell-fracture, and a satiny polish like jade.

From A Touch of Sun and Other Stories by Foote, Mary Hallock

There were rich red garnets, variegated jaspers, chalcedonies and agates of many hues mingled with rock-crystals.

From Wealth of the World's Waste Places and Oceania by Gilson, Jewett Castello

But flint is the staple of the broad Culm Valley, under good, well-pastured loam; and here are chalcedonies and agate stones.

From Crocker's Hole From "Slain By The Doones" By R. D. Blackmore by Blackmore, R. D. (Richard Doddridge)

Many coloured and variegated chalcedonies are cut and polished as ornamental stones, and are described under special headings.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" by Various

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