Rosell Minerales

Aggregate of brown prismatic crystals of this rare niobium and tantalum silicate found in the alkaline pegmatites of the Khibiny Mountains, in this remote area of the Kola Peninsula. It is accompanied by pink aggregates of schizolite, an intermediate member of the pectolite-serandite series, and of lamprophyllite. Identified by Dr. D. Lisitsin.

Size: 5.6 x 3.8 x 2.8 cm.
Main crystal: 1.7 cm.

Lorenzenite is a rare sodium titanium silicate found in pegmatites and nepheline syenites. A lustrous, sharp, chocolate-brown crystals in matrix on this excellent specimen from the Joan Astor Collection.

Size: 4.5 x 4 x 3 cm.
Main crystal: 1.8 cm.
Found in 1994.

Col. Joan Astor.