Platinum Black Opal and Diamond Pendant on 16" White Gold Cable Chain. Flashing Orange, Yellow, Green, and Purple, This Oval Black Opal Center Weighs 4.41ct, Measuring 12.9x10.7x5.1mm. Surrounded by 16 Round Brilliant Diamonds=0.80ctw H/SI1, Respectively. Total Weight of this Pendant is 10.1 Grams.