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Turritella Agate

Turritella Agate

Common to many collections of western rockhounds is this unique agate that comes from southwest Wyoming. Easily identified by what appears to be asphalt made up of tiny fossil fresh water snails. This agate started forming about 50 million years ago when large numbers of snails sank to the bottom of a lake. As the sediment layered, silica carried by water replaced the shell cavities with the hard agate.

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