Authenticity Guaranteed. It comes with a certificate of authenticity . The description is posted. It is an exquisite and rare item Tasaki is a signature brand known to be ethical; In growing their pearl. They supply pearls to Tiffany and Co. It's a designer piece that rarely repeats—one of my collections needs to liquidate for a mission. Note : this is a clip earring. Part of the proceeds will go to cancer research .