Mexican Byzantine smalti, the most authentic material available for archaic glass mosaics. Smalti is made by mixing sand and minerals according to traditional recipes and melting the mixture in a furnace. The molten glass is then poured onto a slab for cooling, and then cut by hand into rectangular pieces. The small hand-made batches result in natural variations in shape and color, which allow the artist to create beautiful life-like images. Thickness ranges from about 3/16 to 1/4 inch. To cover one square foot, you need between two and three pounds. Use our Quick Order Checklist to order rapidly using a list. Cuts quickly and easily with the Mosaic Glass Cutters that we sell.