I'm stoked to have some more of Kaj's amazing 'Wonkastone' aka 'Stack the System' marbles available on Glass ORBits! By this point in my collecting and selling career I've held and gazed upon literally 10's of thousands of marbles, and I'm not blowing smoke when I say these are some of the coolest and most beautiful marbles I've EVER seen and handled. So dang freaking fun, so mesmerizing, absolute glass jewels in the highest sense! Each is unique, and each also has a UV core that glows a killer green inside when you hit it with the black light, flashing through all the little clear holes in the murrini, and is also noticeable at the poles. Very hard to photograph, but wicked cool in hand! Signed 'Kaj'.