Here is one of Mark's famed animal skins, the rare and blinding fast Cheetah! Words can't begin to describe how awesome these marbles are, and you HAVE to get one in hand to see how incredible they are. The graal technique is used to make these, and even though I understand graal, I still scratch my head trying to figure out exactly how he makes these. This is an astoundingly beautiful marble, the kind that has made Mark the most famous marble artist on the planet. Every collection has to have an animal skin! This is also one of the earliest examples of these that you'll find, suuuper nicely done. Signed 'Matthews 1997'.