So why can’t we convert the useless ‘round’, ‘smooth’ desert sand into useful angular sand? E.g. use concentrated sunlight to fuse sand grains together [1], th

So why can’t we convert the useless ‘round’, ‘smooth’ desert sand into useful angular sand? E.g. use concentrated sunlight to fuse sand grains together [1], then crush to the desired grain size. It’s got to be a better solution than shipping sand halfway around the world. [1] http://www.markuskayser.com/work/solarsinter/ http://www.markuskayser.com/work/solarsinter/