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Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
Reserve from the case
Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
Shape: Oval cut
It is a large specimen and displays beautifully
This specimen is certainly one of a kind
This is a quality specimen and would be a beautiful addition to any new or existing rock collection
Pseudomorph Goethite After Marcasite | Prophecy Stone | 38 gr | Farafra Oasis, Egypt Ring Shape: Oval cutPseudomorphs are mineral specimens that have the external shape of one mineral but are composed of another. The pseudomorph goethite after marcasite forms when marcasite is exposed to oxidizing conditions and starts to oxidize and break down. As the marcasite breaks down, goethite replaces it in the crystal structure, preserving the shape of the original marcasite crystal. The resulting specimen appears as a marcasite crystal, but is actually composed
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