This master marble is from Mark's Geometric series, each one of these a sweet piece of marble history! These incredible patterned marbles are made using the graal technique, with black glass layered over white and then the pattern meticulously laid on the marble and blasted away, then completed with a thick layer of crystal dipped and laid over the pattern which makes the whole thing absolutely pop in hand. This one is AWESOME, sooooo nicely done with those fine lines, and it is the middle size from the Labyrinth trio that Mark made. I've also got the smallest size available and they would make a cool pair to own! Signed 'Matthews 2015'.