These cubes are some of my favorite non-marbles glass that is being made. Paul does furnace glass work and hence ends up with a lot of pieces and odds and ends, and those pieces end up in these cubical creations. They are worked into a concrete-type matrix, and the concrete itself has a lot of crushed clear glass in it to give it sparkle. He then cuts out a cube and bevels and polishes it, and the end result is SO awesome!! Paul also creates clear stands for them which the cube sits in, with one corner stuck down in the triangular hole. This particular cube has soooo much color throughout it, with lots of shards everywhere on the surface and through it. There is a small wormhole as well that you will love. Definitely one of my favorite cubes from Paul that I've seen, a real blast to study and contemplate!