MINI metallic glass mosaic tiles sparkle with copper dust swirled throughout the glass.  The tiles have an appearance like semi-precious gemstones and can be used with stunning effect in mixed-media mosaics.  These mini tiles are 3/8" x 3/8" with a thickness of 1/8", which means they can be used with most brands of vitreous glass mosaic tiles. The backs of the tiles are embossed with ridges to help glue bond more securely. Frostproof.  Impervious to liquids.  Can be used indoors and outdoors.