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Makarochkinite: Ca2Fe++4Fe+++TiSi4BeAlO20
Comments: Black grain of makarochkinite on matrix. Location: Pit No. 400, Lake Ishkul', Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia. Scale: Specimen Size 0.5 cm x 0.5 cm. © Carlo Guidarin