Chalcedony

A flint like stone with a waxy appearance, the sources of which are usually nodular.

Chalcedony

Chalcedony i is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony`s standard chemical structure (based on the chemical structure of quartz) is SiO2 (sil....
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Chalcedony

• (n.) A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax.
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chalcedony

. Occurs in limestone, dolostone, and mudstones.
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chalcedony

calcedony noun a milky or greyish translucent to transparent quartz
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Chalcedony

Chal·ced'o·ny (kăl*sĕd'o*nȳ or kăl'se*do*nȳ; 277) noun ; plural Chalcedonies (-nĭz). [ Latin chalcedonius , from Greek CHalkhdw`n Chalcedon, a town in Asia Minor, opposite to Byzantium: confer calcédoine , Middle En...
Found on http://www.encyclo.co.uk/webster/C/51

chalcedony

A cryptocrystalline form of quartz, microscopically fibrous with waxy luster. May be transparent or translucent, and with a uniform tint of white, gray, pale blue, and, less often, black.
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Chalcedony

A general term for fibrous cryptocrystalline quartz.
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chalcedony

a very fine-grained (cryptocrystalline) variety of the silica mineral quartz (q.v.). A form of chert, it occurs in concretionary, mammillated, or ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/c/51

chalcedony

chalcedony (kălsed'unē) [from Chalcedon], form of quartz the crystals of which are so minute that its crystalline structure cannot be seen except with the aid of a microscope. Chalcedony has a waxy luster and is translucent to transparent. The name chalcedony is applied more specific...
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Chalcedony

Chalcedony is a cryptocrystalline, translucent variant of quartz comprised of silica, having usually a whitish colour, and a lustre nearly like wax.
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Chalcedony

Chalcedony is one of the cryptocrystalline varieties of the mineral quartz, having a waxy (semi-gloss) luster.
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chalcedony

Chalcedony. Specimen mined in Namibia A beautiful mineral of the quartz family, consisting of quartz with some admixture of opal. It derives its name from Chalcedon in Bithynia, near which it occurs quite abundantly, and has been known by the name from ancient times. Chalcedony never occurs as ...
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chalcedony

Form of the mineral quartz, SiO2, in which the crystals are so fine-grained that they are impossible to distinguish with a microscope (cryptocrystalline). Agate, onyx, and carnelian are gem varieties of chalcedony
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chalcedony

[n] - a milky or grayish translucent to transparent quartz
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