Like all of Mark's UV marbles, this one is made out of 100% uranium glass, and thus it lights up like a Christmas tree on fire when you put a black light on it. Seriously, it is unbelievably bright! Usually when I take the black light pics, I have to set the exposure to either 2 or 4 seconds in order to get enough ultraviolet light in there to light up the UV glass for a good shot. But with Mark's marbles, even a half second second is usually too much! Truly amazing glass!!

This marble is one of Mark's greatest air trap styles, the Jetson. This is due to the complexity of getting so many air traps lined up and kept in control inside of a sphere of hot glass while Mark is working it. Only an absolute master like Mark can pull off something like this! Signed 'Matthews 2007'.