These wall tiles by Mauricio Affonso are made from the luffa plant. They are strong, light weight, breathable, highly absorbent and completely biodegradable. Can be used as acoustic wall tiles in the home or office.
One of my favorite things. It tessellates but doesn't have a repeating pattern -- blows my mind. I want it as a bathroom floor or something. These look like cement tiles. I should get on figuring out how to make them.