Upon further review....I liked this marble when I first saw pictures of it, but wasn't sure I loved it...until I got it in hand! This is a truly wonderful marble with so much going on inside this fascinating vortex. Tim took various colored chunks of glass and added them to a cobalt vortex, along with other interesting texture and features. The result is his 'Pacific Swell' style of marble, really an enjoyable view. But that's not all! Tim took it further and added a copper electroformed backing, complete with rivets and an extra viewing window. That window lets in light which allows for extra special 'marble viewing joy'. LOVE this marble, hard to let go!