Effetto Glassworks is a glass blowing production studio and artist facility located in the San Francisco Bay area founded by Guido Gerlitz and Luca Rattazzi.

The objective of Effetto Glassworks is to channel the history and heritage of the Venetian glass tradition through a uniquely American perspective. Mixing old world craft with new world ideas and technology, Effetto Glassworks creates glass influenced, but not bound, by tradition.