Our gold mosaic is make by transparent glass with imitation gold foil (Leaf) mounted underside.The advantage is our gold mosaic tile can use in water and outside.We use Ag+ foil with epoxy resin strong bottom protect,so it can be waterproof, anti oxygen,alkali resistance also not easy to fade. By the way,we have SGS test report and patent certificate of this and some photos of successful projects which can give clients confidence to purchasing.