Tinguaite Sphere Ball Russian Stone Gemstone Mineral

Description TINGUAITE SPHERE This is the polished greenish-gray tinguaite sphere. Diameter: 2″ (52mm). Weight – 7.4oz (210 grams). Origin: Russia, Karelia. Some information about tinguaite: Tinguaite is an undersaturated, medium-to coarse-grained, igneous rock consisting of essential alkali feldspar, nepheline, and aegirine (with or without sodic amphibole or biotite). Tinguaite is the hypabyssal equivalent of phonolite. Here you will find other tinguaite spheres >>>