This was purchased at Kawa Seisakusho a long time ago. I'm selling it at a low price since I don't use it. #4120 18×13 Crystal No back foil coating (mirror coating) The absence of a foil mirror effect allows the crystal to shine without diminishing the brilliance of the front, expressing a sparkle similar to a real gemstone. I am also listing this on other sites, so I may suddenly delete it. m(_ _)m