This marble is a study in millie use in a marble! Kevin took a nice little batch of colorful dot millie and joined them into a cane which he twisted in the middle of this marble, and THEN he added another chip of the millie on the outside of the marble! The effect is that when you look at the marble from one side, the millie show through behind the core, and if you look at it from other angles, you see the millie in front of the core, etc. Sweet little colorful jewel here!