A production method for creating sand of higher ql.
This should be slow(similar to the production of tar or cheese(extreme)). A windmill with an alternative attachment a pulveriser(should require steel to make). (it could produced 1 sand a day or something of that effect, 1l of water to 1 stone max capacity is 100l and 100 stones)
The windmill will slowly pulverise Sandstone into sand over a period of time, the machine should need water to prevent the sand just becoming dust and simulate the effects of water.
Formula = (( Sandstone + water*4)/5) *3 + machine)/4
Ofc this is just some guidelines and changes can be made, Thoughts?