This absolute gem has a UV core, and then also UV dots that makes this piece go wildly nuclear when you hit it with the black light! The dot stacking is layered and brilliant in this piece, giving you that inner space to study and explore, the part of marbles that I love so much. This piece is also unique in that it has one of Matt's mandala flowers on both sides, as opposed to in the interior of the marble. Just awesome from top to bottom, you're gonna love this special gem! Signed 'Altier 23'.