I couldn't find the details, sorry. but I took the picture on jan 24th 2013. LOL. there's always 'marble trails' and I come across them fairly regularly. It's a KILLER marble, and it was hard to let it pass through my fingers. I hope whomever gets it really enjoys it! (I would!)
Next time ya see Brian, tell him 'Hey" from us! hoping to see him at the Seattle show!