Beautiful ladies white gold over sterling silver 18 inch designer pearl necklace

gemstone pearl. gem grade AA. color white. cut round cut. height 11 mm. width 11 mm. ctw 3.28 ctw. white gold rhodium plating over solid sterling silver. overall weight 6.93g. length 18 inch. natural and unenhanced . brought it from a well known reputable jewelry dealer and I have the receipt with my name and the piece in question. natural