Hello, I've got another request

After searching for schist sand for a few hours, I searched TFC forums and found that it is impossible in b78:
http://terrafirmacraft.com/f/topic/6061-sand-varieties/
There will always be gabbro sand on schist regions.
Same with several other sands: slate, phyllite, gneiss, marble.

Schist sand is an interesting building material, since it's close to grass, greenish.

Could you please make an artificial schist desert somewhere in an uninhabited region of the world? (Or under ocean). So the person who is crazy for this sand would have to pay travelling like N*10k blocks to get it?