Columbite Ore – Abart International LLC…. Agro Products
COLUMBITE ORE (NB)/ TANTALITE. Columbite, also called niobite, niobite-tantalite and columbate [(Fe, Mn)Nb 2 O 6], is a black mineral group that is an ore of niobium.It has a submetallic luster and a high density and is a niobate of iron and manganese. This mineral group was first found in Haddam, Connecticut, in the United States.