10k White Gold Tanzanite and Diamond Pendant Necklace (0.45 cttw, H-I Color, I2-I3 Clarity), 17" White gold necklace with oval Tanzanite and diamond round at rabbit-ear bail Gemstones may have been treated to improve their appearance or durability and may require special care. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free. Imported