Federal Iron Group We are substantial Direct Buyers for Tantalum / Columbite / Coltan Ores . Current 2009 Ta205 excess 40% Nb205 excess 55% Iether Tantalum ores or Columbite with a high Nb205% Pyroclore Nb ore not wanted. We seek Mine Direct Supplies, no agents please Only quality Grades and Volume supply are needed please. Please contact us with Cert of Analysis pics of Ore and Origin. Competitive Prices and Terms Federal Iron Group Show More