Sebl'yavr Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

References:
- Bulakh, A.G., Le Bas, M.J., Wall, F., and Zaitsev, A.N. (1998) Ancylite-bearing carbonatite of the Seblyavr massif, Kola Peninsula, Russia. Neues Jahrbuch für Mineralogie, Monatshefte 1998: 171-192.
- Sorokhtina, N.V., Chukanov, N.V., Voloshin, A.V., Pakhomovsky, Y.A., Bogdanova, A.N., and Moiseev, M.M. (2008): Cymrite as an Indicator of High Barium Activity in the Formation of Hydrothermal Rocks Related to Carbonatites of the Kola Peninsula. Geology of Ore Deposits 50(7), 620-628.