The backside on this marble isn't as complex as some of Mike's other marbles, but it is every bit as intriguing, as it features one of the shiniest mirrored surfaces I've ever seen in a marble. Underneath the fumigator is a flat bottom which Mike has completely mirrored with fuming. If you look at the 2nd to the last pic, you'll see my gloved thumb relflected perfectly in the marble. Truly cool stuff!