This is the second largest rainbow marble from Mark that I've ever sold, a HUGE beautiful masterpiece that is flat out STUNNING in hand and so much better than these pics show. These are the best rainbow marbles ever made in my opinion, and those transparent colors are just draped over the white core in such tantalizing fashion. These are Mark's most sought after marbles, and have gotten very hard to come by these days as they are all tucked away in the best collections and nobody wants to let go of them. I haven't seen one sell anywhere in a while here. Anyway, if you want the best of the best, don't miss this amazing piece! Signed 'Matthews 2014".