We offer minerals such as Coltan; Gold nuggets; Zircon Sand; Diamond and more in their natural state.Coltan: According to the laboratory analysis, the concentration percentage fluctuates between the 25% and 50% of the sum of tantalum (Ta) plus Niobium (Nb). We are in a position to produce and supply 15 tons to 20 tons per month ( one 20 feet container per month). We will be more than happy to serve your company needs. Contact (sun rise at dot pm.me) us immediately for quotation.Regards