Black impregnation of fine grains of titanoan (4.09-4.76 % TiO2) potassicsadanagaite in hyperaluminous anortite-margarite-clynozoisite rock with corundum and spinel. Potassicsadanagaite is the single dark-coloured mineral in this rock. FOV is ~12x10 mm. Collected, investigated and described by Valentina B. Savel'eva in 1995 in space between Ozernovskii and Krestovskii massifs of Priolkhon'e. Pavel M. Kartashov collection (#3368) and photo.
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