These are sustainably sourced baroque freshwater pearls. Size varies from 9-11mm. 18k white gold plated panther clasp with Austrian crystals, pearls are hand knotted in silk cord. Baroque pearls are like fingerprints, no 2 are alike. They have ridges, layers and marks. That's mother nature. How to tell if a pearl is real: rub it against your teeth and it feels gritty.