Hot House Glass - "Transparent Blue Tri-Toned Swirl"

This is a handmade marble by artists, Brett Young and Larry Zengel of Hot House Glass.  It is a swirl marble with three shades of transparent blue stripes wrapping around the marble.  Inside the marble silver colored flakes are trapped below the blue bands.  Approximately 1 1/2" in diameter.  It is signed with a drawing of a house under flames.