Pseudomorph Goethite After Marcasite | Prophecy Stone | 30 gr | Farafra Oasis, Egypt | SO24 Pseudomorph Name: Okenite with Gyrolite on

Name: Okenite with Gyrolite on Quartz and Prehnite Druse Crystal

with dimensions of 23x20x18 mm

Product ID: TZIM6819

Orthoclase is a feldspar mineral commonly found in igneous rocks like granite

Pseudomorph Goethite After Marcasite | Prophecy Stone | 30 gr | Farafra Oasis, Egypt | SO24 Pseudomorph Name: Okenite with Gyrolite onPseudomorphs 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