Cheap Mosaic Tile - Mosaic Art Supply Shop with the Pros at Mosaic Art Supply: Mosaic Glass Tile, Stained Glass, Smalti, Tools & Mosaic Supplies - Everything You Need To Make a Mosaic! For molded glass mosaic tile, the best value is usually the 3/4″ vitreous glass tile, which is highly recommended for beginners because it is easy to cut and different brands can be used together in the same mosaic.This is a key point because artists often have to source from different brands to get all of the colors they need due to temporary shortages at a particular manufacturer.