Collage sheet glass 3mm Dark Green, Spring Green, and Yellow Frit, Spring Green Streamers Clear Base. Bullseye collage glass is intended for any number of uses. It can be broken into pieces to build a mosaic or collage, or it can be fused with any of (Bullseye) other compatible glasses. Bullseye Glass is Handcrafted in Portland, Oregon, USA. (Source: Bullseye Glass Co.)