This marble is the precursor to the famous rainbow lobed core, using colors you won't ever see any more - since it was made in 1991! Over 20 years old, which is a LONG time in the short history of contemporary art glass marbles. This is a marble for the collector's collector, looking for those rare early gems that define an artist's career and show us where they came from. You've probably never seen a marble like this before, since a) there weren't that many made, and b) they're stashed away in special collections here and there. This is your chance to own history! Signed 'Matthews 1991'.