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Jasper
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Gyöngyöstarján, Mátra Mts., Heves Co., Hungary
© Tamás Ungvári 2005
A variety of Chalcedony
In the traditional sense, jasper is a dense, opaque, microcrystalline variety of quartz (or more strictly, chalcedony), usually red, brown or yellow and coloured by oxides of iron. It has frequently been used as a decorative stone.
Confusingly the term is also used for other silicified rocks or decorative stones (in particular some varieties of rhyolite are often termed jasper).
Visit gemdat.org for gemological information about Jasper. Currently in public beta-test.
In the traditional sense, jasper is a dense, opaque, microcrystalline variety of quartz (or more strictly, chalcedony), usually red, brown or yellow and coloured by oxides of iron. It has frequently been used as a decorative stone.
Confusingly the term is also used for other silicified rocks or decorative stones (in particular some varieties of rhyolite are often termed jasper).
Visit gemdat.org for gemological information about Jasper. Currently in public beta-test.
symbol to view information about a locality.
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