Pieces of marble with continuous grain are stacked on top of each other spaced apart with our Octahedron bases, which are bent out of a continuous piece of wire rod. The carbon steel bases are dipped into phosphoric acid which creates a similar flat gray as the vines of the honed stone. The half inch diameter rods have the same exact radius as the twelve edges of the one and a quarter inch thick slabs. Height adjustable feet allow these shelves to be perfectly level even if the floor underneath is uneven.