I wonder if it's possible to "roughen up" smooth sand for this purpose. Shoot it against itself in a special machine, thus breaking it to smaller, sharp-edged p

I wonder if it's possible to "roughen up" smooth sand for this purpose. Shoot it against itself in a special machine, thus breaking it to smaller, sharp-edged pieces... or something. "Large Saharan Collider – not what you think it is!"