Columbites

Translation columbites into russian

Noun

Columbite is an important ore of niobium.

Колумбит является важной рудой ниобия.

Noun

A black mineral consisting of an oxide of iron, manganese, niobium, and tantalum, typically occurring in granite and pegmatites.

The geologist discovered a rich vein of columbite in the old quarry.