Abstract: A translucent block assembly, for use in a decorative wall, window or the like in a building, has a connector extrusion for connecting juxtaposed translucent blocks in an opening of a frame having a recess extending around the opening. The connector extrusion has an alignment projection fitting snugly into gaps in the peripheries of the blocks for aligning the blocks and abutment faces for abutment with the blocks, and also has outwardly facing side faces engaging snugly in the recess.