Beautiful Swiss Blue Topaz and Diamond pendant is crafted of solid Sterling Silver .925 and measures 17mm x 8.5mm (0.67" x 0.34"). The oval blue topaz measures 7mm x 5mm and weighs one carat. There is .01 carat of diamonds. All stones are genuine and prong-set. The loose rope chain measures 18" in length and features a spring ring clasp. Weight of the chain and pendant is 2.40 grams. Marked 925.