Hot House Glass - "Transparent Cool Tri-Colored Swirl"

This is a handmade marble by artists, Brett Young and Larry Zengel of Hot House Glass.  It is a swirl marble with bands of transparent violet, blue, and pale green wrapping around the marble.  Inside the marble silver-colored flakes are trapped below the bands.  Approximately 1 5/8" in diameter.  It is signed with a drawing of a house under flames.