This is a pale green transparent reducing glass, similar to TAG’s Taxco. Golden Emerald’s effects differ over a light or dark base glass, and by how much oxygen you use in your reduction flame. When reduced with little or no oxygen, by itself the Golden Emerald takes on a golden metallic sheen over its transparent golden green. When reduced with some oxygen on a darker base glass, Golden Emerald produces strong metallic oil-spot colors of purple, blue, electric green, and more. Please note that it is difficult to encase the reduction on this color.