One Ladies 14k White Gold Blue Topaz, London Blue Topaz, and Diamond Pendant on a 16-18" Adjustable 14k White Gold Cable Chain. 44 Round Diamonds have a total weight of 0.22 cts. One Elongated Marquise/Oval Cut Blue Topaz has a total weight of 1.70 cts. One Marquise/Oval Shaped London Blue Topaz has a total weight of 0.39 cts.