Låvenite

Spray of yellow låvenite crystals on matrix. From Demix Varennes Quarry, Monteregie, Quebec, Canada. Field of view is about 2 mm. (Image courtesy Douglas Merson; unauthorized reproduction is prohibited.)

Formula: (Na,Ca)₂(Mn,Fe)(Zr,Ti)(Si₂O₇)(O,OH,F)₂ Monoclinic

Description:

Låvenite as brown radiating crystals with black magnesio-arfvedsonite crystals in matrix. From the Kuropachii pass, Kola Peninsula, Northern Region, Russia. Specimen is 5.5 x 5.5 x 3 cm in size. (Image courtesy Dan and Diana Weinrich Minerals; unauthorized reproduction is prohibited.)

Låvenite is a very rare mineral found in low silica pegmatitic igneous rocks.

MARATHON COUNTY: Låvenite reportedly occurs in nepheline syenite in a quarry and nearby outcrop in the NE sec. 27 T.29N. R.6E. (Weidman, 1907; Vickers, 1956).