Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia

Includes a natrolite vein on the Southern slope of Eveslogchorr Mt. between Yuksporlak pass and 1st left tributary of Vuonnemiiok river.
This natrolite vein was mined before 1980, and was blasted in 1993. Main part of material from this vein was collected from the slope, not from solid rock. The natrolite crystals were harmed by frost and show typical pearly lustre as result of cracking of microinclusions filled with water.

Refs.:
Yakovenchuk, V. N., Ivanyuk, G., Pakhomovsky, Y. & Men'shikov, Y. (2005): Khibiny. Apatity & London (Laplandia Minerals in association with the Mineral. Soc. of GB & Ireland), 468 pp.