This is a fantastic Impactite Fallback Breccia from Germany weighing 69

unusual for ammonoids

partially with very big white anorthite clasts

Weight: 110 Grams / 3

and overall well-being

Pseudomorph Goethite After Marcasite | Prophecy Stone | 51.7 gr | Farafra Oasis, Egypt | SO24 Monturaqui This is a fantastic ImpactitePseudomorphs 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