Group of hinnganite-(Ce) dipyramidal crystals, etched from calcite-filled cavity in epidote-quartz metasomatites is covered by yellow spherulitic hydromuscovite. Formed by replacement of rare metal alkalic granitic pegmatite.
Location:
Western ore zone dumps, trench #2, Tsakhirin Khuduk Y-Zr-Nb deposit, Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia.