Friday, August 19, 2011

Onyx Gemstone,Original Onyx Gemstone,Onyx Stone

Onyx Gemstone :-



Onyx is a chalcedony that occurs in bands of different colors. It is composed of relatively straight, parallel layers of different colors. When the dark layers are brown or brownish red, it is often called Sardonyx. Onyx is a form of agate with parallel banding. This structure lends itself to cameo making.

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