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Bystrite, Lazurite, Calcite, Phlogopite


Bystrite : (Na,K)7Ca[(S3)1.5|Al6Si6O24] · H2O, Lazurite : (Na,Ca)8[(S,SO4,Cl2)|Al6Si6O24], Calcite : CaCO3, Phlogopite : KMg3[(OH,F)2|AlSi3O10]

Photo Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Malo-Bystrinskoye lazurite deposit, Tounkinskaya valley, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
Bright sulphur-yellow grains of bystrite together with blue lazurite crystals in white calcite marble with minor pearly colourless Fe0free phlogopite. Note that on this side of the specimen bystrite replace lazurite. Lets look on the back side. Specimen size is 3.5x3.5x2 cm. Pavel M. Kartashov collection and photo.

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