This is a very early marble from Maslach, most likely from sometime in the 80's, a sweet piece of history! I thought at first this one had dichro in the core from the way it sparkled, but when I saw the detail in the pics I realized it was tiny air traps in the glass, so small to the naked eye that they sparkle like little diamonds in there. Suuuper unique Maslach marble and REALLY cool!