Descending Form

An American Studio Glass Movement Glass Sculpture titled "Descending Form" by, Harvey K. Littleton consists of blown overlay, colored glass  in colors of purple, pink, lilac, and orange cased in a heavy clear glass overlay and further cut and polished. The piece is signed, "©Harvey K. Littleton 11-1989-3" 

Literature:
Harvey K. Littleton: A Life in Glass; by, Falconer Byrd - pg.136 - for similar example