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TURRITELLA AGATE - unpolished piece - Wyoming, USA

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'TURRITELLA AGATE'

Unpolished piece of the so-called 'Turritella agate' which is a popular gemstone
 
50 million years old

Wyoming, U.S.A.

The attractive ‘Turritella agate’ from the Green River Formation in Wyoming consists of tightly-coiled snail shells (gastropods) preserved in chalcedony, a variety of quartz.

However, despite its name these shells are not Turritella, which is a marine gastropod, but the gastropod Elimia tenera, which is a freshwater species.

This piece has two cut faces but is unpolished.

Click on a picture for a larger image

Size:  approx. 9 x 6 x 3 centimetres
Weight:  313 grams

PRICE: £15.00