This lovely antique carved shell cameo with diamond necklace pin is marked 14K. I have not had the stone tested. The pin measures approximately 1-7/16" by 1". The item "ANTIQUE 14K GOLD FINELY CARVED SHELL DIAMOND NECKLACE LOVELY LADY CAMEO PIN" is in sale since Thursday, April 14, 2016.This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Victorian, Edwardian 1837-1910\Cameos". The seller is "deja--voodoo" and is located in Santa Cruz, California. This item can be shipped worldwide.