Dimensions:  81x78x55 mm / 3

Size: 14x10

It has a metallic luster and often develops an iridescent tarnish in shades of purple

Dimensions: 54x27x19 mm / 2

Pseudomorph Goethite After Marcasite | Prophecy Stone | 42gr | Farafra Oasis, Egypt Pendant Dimensions: 81x78x55 mm / 3Pseudomorphs 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