Aurora Borealis Cyan Copper is a CBS premium dichroic coating offered on ripple glass COE 96. Aurora Borealis Cyan Copper fires to a variation of Cyan Copper, magenta green, Pink Teal and gold colors. This coating is offered on clear and black glass in a 4x4 inch square or a quarter sheet. There are approximately 66 square inches in a quarter sheet of glass. Please Note: All photos on black glass.