This is 'Surprise Inside #2' (#2 from 2012), and its surprise is bucketfuls of Draconis glass swirling in solid motion all the way to the deepest depths of this vortex! The satin window is SO cool. Floating up top is a super rare polished green opal, which turns to blue as well depending on the angle. The opal is a super satin just like the Draconis, pure satin as far as the eyes can see! The backside is an excellent sparkled pinwheel pattern, and then a spyro-gyra on the very bottom with more satin. There's one more surprise though - ANOTHER opal lurking just under the surface on the bottom pole of the marble. It's a little bonus that makes you go 'whoa, HEY, there's another opal down here!' AWESOME!!!!! This is absolutely one of best vortexes that has ever been made, and this is Jahfree's favorite from this batch - and it is HUGE.