Columbite (5.8 x 6.6 x 6.5 cm)

27.28

Columbite from Viitaniemi pegmatite, Finland.

Description

Formula: (Fe,Mn)(Nb,Ta)2O6

System: Orthorombic

Series: Columbite-tanatlite series

Locality: Viitaniemi, Eräjärvi, Orivesi, Pirkanmaa, Finland

Habit: Lamellar

Color: Black

Luster: Submetallic

Weight: 264 g

Dimensions: 5.8 x 6.6 x 6.5 cm

Additional information

Weight 370 g
Dimensions 160 × 140 × 115 mm