Pseudomorph Goethite After Marcasite | Prophecy Stone | 27 gr | Farafra Oasis, Egypt | SO24 Lunar Color: White

Color: White

Clarity:  Silky

Wiśniówka Wielka is also a well known locality of beautiful crystals of Variscite and Wavellite

Name: Cactus Quartz Crystal Cluster

Comes with a signed Mark Bostick Collection and a Canagem Collection specimen cards

Pseudomorph Goethite After Marcasite | Prophecy Stone | 27 gr | Farafra Oasis, Egypt | SO24 Lunar Color: 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