I just love these earrings, not my colour really but I think they are beautiful. Are they Tahitian Pearls? They have an amazing array of colours and the gold is 18K. Size wise, they are about 13mm by 11mm. Overall they look in good condition but have a a couple of tiny small marks which I have tried to show in the photos but they seem part of the pearl. Unfortunately, no makers mark on the gold. Any help would be really appreciated. Many thanks.