Dimensions:  75x50x31 mm / 3x2x1

This premium piece displays very well as the wafer thin slice shows an excellent surface area for its weight

Laumontite is a member of the zeolite group

Product Type: Tsavorite Beads

Color: Royal Blue

Pseudomorph Goethite After Marcasite | Prophecy Stone | 20.8 gr | Farafra Oasis, Egypt Dronino Dimensions: 75x50x31 mm / 3x2x1Pseudomorphs 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