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Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
Reserve from the case
Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
Shape: Round Cut
Origin: Ukraine
superb shape and good size
Shape: Oval Faceted Cut
Comes in a gem jar
Pseudomorph Goethite After Marcasite | Prophecy Stone | 30.2 gr | Farafra Oasis, Egypt | SO24 L3-6 Shape: Round 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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