This is a HUGE dichro vortex from the Mazets, with one of the most interesting backsides I've ever see on one of their marbles! The dichro, as usual, is much better in hand, showing off more purple along with the blue like the picture shows, and the cobalt blue behind the dichro comes through as well. Gorgeous in hand! But check out that backside, with gold landscaping all over the ocean base - SWEET!