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Magnesiocoulsonite: MgV+++2O4 Tremolite: [ ]Ca2Mg5Si8O22(OH)2
Comments: Black grains of magnesiocoulsonite with green chromian tremolite. Metallic bronze grain of thiospinelid of kalininite-florensovite series is visible in the upper right corner of the image.
Location: Pereval Marble Quarry, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia.
Scale: FOV is 3x2 mm.
© Pavel M. Kartashov