This is an authentic 18K Yellow Gold Prehnite Pearl Aquamrine Peridot Tweejoux Necklace 50". The necklace is crafted of 18 karat yellow gold and features a strand of tumbled Prehnites, white Freshwater cultured pearls, and faceted peridot and aquamarine rondelles, finished with a buckle clasp. Follow this item for alerts. David Yurman is a registered trademark of David Yurman. FASHIONPHILE is not affiliated with David Yurman.