Pay in 4 interest-free payments of $8.75 Learn more
Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
Approx Weight (per piece): 8
Color: Multicolor
Weight: 131 Grams / 4
a little north of Sudbury
Weight: 204 grams - 7
Pseudomorph Goethite After Marcasite | Prophecy Stone | 45.2 gr | Farafra Oasis, Egypt Tatahouine Approx Weight (per piece): 8Pseudomorphs 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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