Twizzle G-Magenta Blue is a CBS premium pattern dichroic coating. This coating is applied to Emerald thin glass #1417. As the dichroic coating breaks up during firing the glass color shows through. This coating is offered in 4x4 inch squares only. Please Note: Colored dichroic glass is exceptionally hard to photgraph. Glass is much brighter than it appears. Photo shows front and back of glass.