Foil Backed

Foilbacking is a gemstone surface enhancement technique where a thin sheet of, sometimes colored, metal is placed behind the gemstone (backing) in order to reflect more light, and/or color, back into the stone and then towards the viewer. This technique has been applied since at least Minoan times (2000-1600 BC) and is refered to as foiling.

Georgian Foil Backed Chrysoberyl Bracelet.