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Ships within 48 hours · Estimated delivery Aug 24 - Aug 29
Reserve from the case
Ships within 48 hours · Estimated delivery Aug 24 - Aug 29
Size: 6x5mm
Shape: Oval Faceted Cut
Product ID: ITRB9780 (Appraisal of $1
Dimensions: 127x106x47 mm / 5x4
Dimensions: 49 mm / 1
Pseudomorph Goethite After Marcasite | Prophecy Stone | 30.2 gr | Farafra Oasis, Egypt | SO24 L3-6 Size: 6x5mmPseudomorphs 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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