Moganite/Chalcedony ps. After fossilized Snail

Dakhla, Oued Ed-Dahab-Lagouira, Western Sahara, Morocco
Thumbnail, 2.7 x 1.5 x 1.3 cm
Start Time: 01/12/2017 6:30:00 pm (CST)
End Time: 01/19/2017 6:30:21 pm (CST)
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Item Description

A sculptural, excellent and rare combination pseudomorph from this very obscure African locale. The perfectly fossilized spiral Turritella-like snail has been replaced by lustrous, translucent, brown chalcedony and has a coating of white moganite, a very rare SiO2 modification, that is not uncommon as a minor component of finely crystalline chalcedony (as well as chert or flint) (MINDAT). This 360-degree cutie is pristine. Rare material. Value??

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