This marble is a prototype Yoshi made for the 2011 Glass Addiction Alphabet Marble Contest. His entry was the letter 'X', and this one didn't make the cut, didn't really turn into an X the way he envisioned it. But, it turned into an INCREDIBLE one-of-a-kind marble. It features a gorgeous square white opal perfectly suspended in the very center of the marble. Then it has two concentric but opposite axis rings going around that opal. It allows for all kinds of 3-dimensional viewing possibilities as you rotate it around and around, seeing the inside and outside of each ring. Once again, I don't even know how he's technically able to pull this off, and as usual, so cleanly at that. Really a crazy killer marble!!
You can also view a sweet HD video of the marble! Click on the first pic and then scroll down and you'll see the video below the picture. You can select a lower video quality for faster loading if you desire. Select 720p for HD.