I'll never cease to be mind boggled by Nathan's creations! Here's another masterpiece that features a core of crushed opal over dark glass, followed by amazing millie windows that feature crazy depth! This one is wicked cool in hand, with all of that inner sparkle that you discover as you stare into those wild looking windows. Ugh, every marble of Nathan's that I list is a keeper that I don't want to let go of. Such a legend! Signed 'NM 26' and comes tucked safely in a special Middleton Glassworks wooden box.