chrome sand 60% (low silica)

we are chromite benefecators for past 18 years and produce chomite of high grade i. e. 58% + (cr2o3) and sio2 1% below
we can supply chromite sand of high grade of 58%+ with following description :
cr2o3 : 58% +
sio2 : below 1%
al2o3 : 10