Rare Ammonite Cufflinks by KORITE The color of the stone changes depending on the angle and light. I received these as a souvenir from Canada and have kept them stored away without using them. The gold-colored part has a hallmark, but I can't read it, so the material is unknown (Photo 13). The box has stains (Photos 14-16). The cufflinks are in very good condition with no scratches or discoloration. Although they are unused, please understand that they have been stored for a long time. Thank you for looking.