We're searching new convenient supplier for lead ore and zinc ore,so if you're albe to supply it,please could you make me your best quotation as follows: 1. Lead ore(Pb 60%min) Zinc Ore(Zn 50%min S 25%min) 2. Other impurities% 3. Quantity per month or per shipment 4. Price FOB 5. Payment terms L/C 6. Origin 7. Delivery Could you pls also send me your chemical guarantee specifications and your mining license and export license for our reference?