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Ships within 48 hours · Estimated delivery Sep 9 - Sep 14
Reserve from the case
Ships within 48 hours · Estimated delivery Sep 9 - Sep 14
Dimensions: 152x95x101 mm / 6x3
Size: 102x102x40 mm / 4x4x1
as well as flattened and tabular
Shape: Octagon Tablet
Pseudomorph Goethite After Marcasite | Prophecy Stone | 27 gr | Farafra Oasis, Egypt | SO24 Lunar Dimensions: 152x95x101 mm / 6x3Pseudomorphs 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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