18K Yellow Gold / Black Rhodium "Duet" Pendant With One Cushion Cut Green Tourmaline Weighing 1.73Cts (7.81X6.66X4.92mm) Accented With 28 Round Alexandrite Weighing 0.31Cts And 26 Round Brilliant Cut Diamonds Weihging 0.13Cts, On 16-18" Adjustable Le