[sylnyc]

Thank you very much Gunther and Belassi for your answers. 

I do not want it to be abrasive Gunther, I was trying to make it more cleansing/degreasing. I wanted to create a product to clean makeup sponges, it cannot be abrasive otherwise it can ruin the sponges. If it was a dishwashing product then yes the abrasiveness of the crystals would have been welcome!

In any case, thank you for the information and your time.