Mayco’s Crystalites are gloss glaze bases with pieces of glass frits that melt during the firing process. As the crystals bloom, they produce dramatic, colorful effects. We call it "Art in a Jar". Combine Mayco crystal glazes with other Mayco glazes, such as Stroke & Coats and Foundations for unique glaze combinations. For mid-range fire artists, the crystal glazes maintain their color with increased crystal movement at the higher temperature. Crystalites are non-toxic, and safe for use by artists of all ages. Not recommended for dinnerware due to surface characteristics.