A Fine Platinum, Tanzanite, and Diamond Brooch, Van Cleef and Arpels, containing one cushion cut tanzanite that weighs approximately 66.38 carats, and 104 round brilliant cut diamonds weighing approximately 6.88 carats total. Stamp: VAN CLEEF & ARPELS SL500.Accompanied by a AGTA Gemological Testing Center tanzanite identification certification number 92013106, dated February 27, 2003, stating Species: Natural Zoisite, Variety: Tanzanite, Weight: 66.38 carats, Enhancement: Heat. 30.00 dwts.