Chrome ore, grade I, II from mine

We are now mining on joint venure basis with local authority on Copper, Mn and Chrome as happen. The specification as below:

Grade I
Cr2O3: 38-40%
SiO2: 14% max
P: 0.01% max
S: 0.01% max
Cr:Fe 2.4:1 min

Grade II
Cr2O3: 42-44%
SiO2: 10% max
P: 0.003% max
S: 0.005% max
Cr:Fe 2.5:1 min