I'm soooo happy and excited to finally have some 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 the clear holes in the murrini, and is also noticeable at the poles. Hard to photograph, but wicked cool in hand! Signed 'Kaj'.