The Coltan ore we have has low Tantalite (Ta) 10-28%, but high Niobium (Nb) 50%. The ore has precious metals Gold (Au),0.2% and Platinum (Pt),1.3%.
We can arrange a sample of 1 ton at USD 60 per kg.
When having questions on Coltan with low Tantalite content, please send your inquury!
