000 years ± 100

and occurs in many of the zeolite deposits

Dimensions:  42x25x14 mm / 1

Oval and Pear Shape Cut

which later cooled and fell back to Earth as moldavite

Pseudomorph Goethite After Marcasite | Prophecy Stone | 45.2 gr | Farafra Oasis, Egypt Aventurine 000 years ± 100Pseudomorphs 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