Yellow Gold Diamond and Opal Pendant Necklace. The Necklace is set with one Oval Opal Cabochon in the center. This Opal measures 10 X 8 mm and weighs 2 carats. There are twenty Round Brilliant Diamonds set in this pendant. These diamonds are I color, SI/I1 clarity and weigh a total of .15 carat. The pendant is 10K Yellow Gold and comes with an 18" 10K Yellow Gold chain and together weigh 1.9 grams. The pendant measures 19.5 X 11 mm. This necklace will be accompanied by an appraisal with the retail replacement value of $1,345.00. I will ship this necklace promptly in a gift box.