Cryolite, Gaidonnayite, Albite
Shomiokitovoe pegmatite, Umbozero mine, Alluaiv Mountain, Lovozersky District, Murmansk Oblast, Russia
White, granular, partially dissolved cryolite agregate. It is absolutely invisible into fresh rock. But on weathered surface of specimen from dumps it become visible. In difference from nepheline, which also is soluble, this cryolite has weak whitish-blue SW UV fluorescention. Grains, etched from the cryolite, are represented by gaidonneyite (with ...
© Pavel M. Kartashov collection & photo