by staralliance » Apr 25, 2019 Hi , I recently purchased the black diamonds tag by david yurman on ebay. Seller seems to be legit with many feedback and previous history. He also mentioned the piece is 100% authentic. I received the tag and sent it to my jeweler and he said the black diamonds are not real (he checked them using that device in the pic attached) I want to confirm with you does david yurman use real black diamonds? Or just stones? Please advise before i return this. .