Chopard 18K White & Rose Gold Diamond Necklace Chopard Unisex Necklaces. SKU: 66370. Color: Two-tone. Metal Type: Gold. Metal Stamp: 18k. Metal Weight: 18.2g. Gem stone type: Diamond. Stone weight: 0.72ct. Stone clarity: VS1. Stone color: F. Necklace style: Pendant. Chain type: Cable. Closure type: Lobster. Pre-Owned Chopard 18K White Rose Gold Diamond Necklace.