These are natural raw 18” Tahitian baroque brown green pearls with 925 sterling clasp. Pearls are potato shaped with circle in the middle. Average pearl is 11mm round and beefy. How to tell if the pearl is real: rub against your teeth and it feels gritty. 925 sterling 10k 14k 18k necklace earrings bracelet bangle ring band tennis solitaire pave princess halo eternity hoops stud aquamarine jade bangle onyx quartz garnet turquoise blue pink brown mystic topaz coral freshwater south sea pearl