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Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
Reserve from the case
Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
Dimensions: 73x55x50 mm / 2
Shape: Cushion Cut
Weight: 42
We include 2 specimen cards but unfortunately the thin section and coin used in the ad are NOT included
Pseudomorph Goethite After Marcasite | Prophecy Stone | 31 gr | Farafra Oasis, Egypt | SO24 Size:B Dimensions: 73x55x50 mm / 2Choose your Pseudomorph! Pseudomorphs 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,
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