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Ships within 48 hours · Estimated delivery Sep 16 - Sep 21
Reserve from the case
Ships within 48 hours · Estimated delivery Sep 16 - Sep 21
it displays numerous well-formed
Hunan Province
Size: 10mm
Here we have for you a nice looking end cut of a Sahara Desert NWA unclassified meteorite weighing 164
Pseudomorph Goethite After Marcasite | Prophecy Stone | 30.3 gr | Farafra Oasis, Egypt | SO24 NWA 4293 it displays numerous well-formedPseudomorphs 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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