Sell Loose Semi-precious Stones

We are in need of the following item on long time business
Product name       : Potasium Feldspar
Specification      : SiO2     65% min
                     Al2O3   16%~18%
                     Fe2O3  0.5% max.
                     Na2O2  0.3%min.
                     K2O      15% min.
    + (size >=0,8mm): none
    + (size >=0,5mm): <= 5%
    + (size: 0,1mm - 0,5mm): >= 60%
    + (size <0,1mm) <=35%
- Moisture: <= 1%
Quantity: 600MT per month
Payment: by irr. L/C at sight
Destination port: Haiphong port Vietnam
Price term: CIF Haiphong port, Vietnam
Please quote us your best CIF Haiphong price