14k White Gold Blue Topaz Pendant with a Diamond and Sapphire Halo on an adjustable 16-18" 14k White Gold Cable Chain. One Round Swiss Blue Topaz has a total weight of 0.58 cts. Also, 8 Round Diamonds have a total weight of 0.04 cts. Also, 8 Round Sapphires have a total weight of 0.09 cts.