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.
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