JewelStop Silver Rhodium Plated 3.6 mm Diamond-Cut Rope Chain Necklace, Lobster Claw - 20", 24.2gr. Ravishing and stunning rope chain necklace brought to you by Jewelstop. The rope chain necklace is crafted in 925 sterling silver stamped and marked. The rope chain is silver in color and has a lobster claw clasp. We offer you 1 year warranty along with 30 days money back guarantee. The product dimensions are: 20" long and 3.6mm in width.