BSE image of kumtyubeite (Kmt) associated with srebrodolskite (Srb), bultfonteinite (Blt), Ca- kydrosilicates, wadalite (Wad), rondorfite (Rndr), and ettringite (dark gray). (AmMin, v94:1361).
Location:
Rock-forming mineral found in skarn carbonate-xenoliths in ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia.