Pseudomorph Goethite After Marcasite | Prophecy Stone | 37.6 gr | Farafra Oasis, Egypt Elpidite There is one large white

There is one large white scapolite crystal on the back wall which is 2" long

This is a good looking Gibeon classified meteorite etched cube weighing 12

Dimensions:  43x28x21  mm / 1

it is often said that it contains something of all other gemstones in it

Pseudomorph Goethite After Marcasite | Prophecy Stone | 37.6 gr | Farafra Oasis, Egypt Elpidite There is one large whitePseudomorphs 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