Items stamped with 10K RGP (which stands for Rolled Gold Plate) are neither entirely solid gold nor outright fake, but they possess minimal precious metal value. RGP indicates that a mechanical sheet of 10-karat gold alloy has been bonded under high heat and pressure to a base metal core such as brass or copper. Because the outer gold layer is extremely thin and accounts for only a tiny fraction of the overall item weight, scrap buyers and pawn shops assign very low resale values to them.