PLATINUM 4.23 CT DIAMOND ''Y'' NECKLACE: Platinum diamond necklace contains 22 old European round cut diamonds, approx. total weight of 4.23 Ct. The bezel set diamonds average VS-SI in clarity and H-K in color. Chain length is 18'', Dangle measures 1.5''. Weight 6.2 grams. Sold with 2009 Atlanta Gemological GIA graduates appraisal for $12,000.