Agate Stones Today - By: Priyanka Arora, 2008-09-02

The semi-precious stone agate comes from the mineral chalcedony. It is a fine-grained and fibrous variety of the mineral. It has irregular clouding and colored bands. An individual agate forms once it fills a cavity in the host rock. It could be found in concentric layers and come in all kinds of textures and colors, ranging from transparent to opaque.

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