Anna, I thing I could make some of that, I have a very fine seaweed powder, I can get slaked lime, I am wondering about the plant fibers, it look really like fine stuff in the picture, heck I could use silk batting….may be not fine enough,,,got to think
Thanks Anna, I am going to be using the messed up one in the garden for fertilizer, it crumble that easily 
Anyone with an Idea for fine plant fibers, Anna is on to something big, if we can mix the plaster+seaweed+sand, it will generate a new kind of energy
Josh