“Silvery-grey cleavage surfaces of Delhayelite, rare phyllosilicate mineral from Rasvumchorr Mt, Khibiny, Kola Peninsula, Russia. This Delhayelite from Khibiny massif is strongly fluorescent under LW UV (image on the right). The brownish-yellow blades are Lamprophyllite. Specimen measures 55 x 42 x 16 mm. ”