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Tsaregorodtsevite: N(CH3)4AlSi5O12
Comments: Translucent tsaregorodtsevite crystals, with small quartz crystals, on mica schist. Location: Near Mount Yaruta, Man-Khambo Range, Republic of Komi, Near-Polar Urals, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species