Roberto Coin Small 18 Kt White Gold Bangle With Diamonds And Sapphires Flowers. Total Diamonds 1.2 Carat. Dr. Israel Perry is a graduated G.I.A gemologist for over 40 years. He was one of the few people in the world to hold in his hands Royal Russian Jewelry. Back in the 90's Dr. Perry was the appraiser for Lloyd's London for the purpose of insuring the Royal Russian Jewelry collection while being in an exhibition at the Israeli Diamond Exchange in Tel Aviv , Israel