Thomsenolite, Quartz
Ulug-Tanzek deposit, Erzin massif, Kaa-Khemsky District, Tuva, Russia
11x6x3.5 cm chunk of almost pure sugar-like aggregate of Thomsenolite. The aggregate is composed by 0.3-1 mm long prismatic crystals and form cement of the quartz breccia. Such quartz-thomsenolite breccias are formed along tectonic faults of large cryolite body on the locality. Associating minerals are grey granular quartz and black films of not ...
© Pavel M. Kartashov collection & photo