I have coltan for sale. My uncle recently landed a contract with the government to mine coltan in DRC.
I am located nearby in Chicago and have samples and willing to meet and discuss more in details.
Please feel free to reply to me and I will put you in contact with the rep (also based in chicago) that represents the mine and who can provide you with all details.
When having questions on Coltan supplies, mine coltan in DRC, please send your inquury!