This is one of the most beautiful, most colorful, and deepest vortexes I have ever seen. It seems to wind down in there forever!! Seriously stunning to behold, this one will be a real crowd pleaser in your collection, garnering those major oooh's and aaaah's we all love to hear, ha ha. The back is equally awesome - wonderful transparent colors cover the bacside, allowing you to see through to the colorful construction of the vortex behind it, making the optical illusion of the vortex that much trippier. Another marble I GUARANTEE you will love, and one that is terribly hard to let go of. Signed with her full name (I believe to signify particular pride in this marble) 'Teri Conklin 03'.