Columbite ore for sale 50%Nb+4%Ta 20-75t per month FOB

We have columbite ore to sell.
Columbite (niobium + tantalum) with a content > = 50% Nb + > = 4% Ta in the minimum quantity of 20 tonnes per month and not more than 75 tonnes per month.
Produced for export.

Term of contract: 24 month period.

Price: 21 US dollars per kg FOB Manaus Port