A SUBSTANTIAL 18K ITALIAN RIVIERE DIAMOND NECKLACE: 18K yellow and white gold necklace diamonds totaling approx. 4 Ct. 183 round brilliant cut, rated VS-SI in clarity and G-H-I in color. Diamonds are bead set. Locking closure with hidden clasp. Length 16''. Width .25''. Weight 89 grams. Sold with current Atlanta Gemological Lab GIA graduates appraisal for $18,500.