Tsaregorodtsevite, N(CH3)4[Si2(Si0,5Al0,5)O6]2 with Anatase (3cm)
Yaruta Mt, Mani-Khambo Mts, Khanty-Mansi Okrug, Polar Urals, Russia (type locality)
Collection Pierre Perroud (now in NHM Geneva).
Photo Phillipe Wagneur, MHN Genève. © Athena 2016