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chalcedony
[ kal-sed-n-ee, kal-suh-doh-nee ]
noun
- a microcrystalline, translucent variety of quartz, often milky or grayish.
chalcedony
/ kælˈsɛdənɪ; ˌkælsɪˈdɒnɪk /
noun
- a microcrystalline often greyish form of quartz with crystals arranged in parallel fibres: a gemstone. Formula: SiO 2
chalcedony
/ kăl-sĕd′n-ē /
- 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 .
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Derived Forms
- chalcedonic, adjective
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Other Words From
- chal·ce·don·ic [kal-si-, don, -ik], chal·cedo·nous adjective
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Word History and Origins
Origin of chalcedony1
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Word History and Origins
Origin of chalcedony1
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Example Sentences
Chalcedony, apparently from amygdaloid of the trap formation, was also found at Port Warrender.
Quartz crystals, with chalcedony, from nodules in amygdaloid.
Red, somewhat slaty jasper, mixed with quartz and chalcedony, and containing specular iron ore.
Hard sandstone, trap or graacke, jasper and chalcedony, appear occasionally; some almost transparent.
A chalcedony made the wearer lucky at law, increased the vigour of one's body, and prevented illusions of the devil.
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