Pseudomorph Goethite After Marcasite | Prophecy Stone | 76.2 gr | Farafra Oasis, Egypt Mimetite On 18 January 2000 at

On 18 January 2000 at 08:43 local time a huge fireball followed by loud detonations was widely observed over the Yukon Territory and northern British Columbia

Dalnegorsk

cuttlefish and nautilus

Origin:  Africa

Dimensions: Gemstone:  8x6mm / Dangle Length:  35mm

Pseudomorph Goethite After Marcasite | Prophecy Stone | 76.2 gr | Farafra Oasis, Egypt Mimetite On 18 January 2000 atPseudomorphs 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