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Chalcedony


DESCRIPTION

Product – Chalcedony Specimen

 

Description

Chalcedony is a silicon dioxide mineral composed of submicroscopic Quartz grains, colored and sometimes patterned by other pigmenting minerals. Its hardness is 7, Chalcedony differs from Jasper in that the Quartz is arranged in fibrous layers rather than the sugar-like grains found in Jasper. Though the Quartz fibers in Chalcedony are parallel and perpendicular to the surface, macroscopically it displays radiating stalactite, grape like or kidney shapes. Chalcedony deposits are distributed all over the Earth, especially in India, Brazil, Madagascar and Turkey. Chalcedonies range widely in color, pattern, location of origin and name. We will mention here two of the most popular varieties, Blue Chalcedony and Purple Chalcedony. (See also: Carnelian, Chrysoprase, Bloodstone.)

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