10K White Gold Blue Topaz, Kyanite, London Blue Topaz, Apatite, Aquamarine Necklace set with two of each gem in the necklace with 0.10tdw of diamonds. Blue topaz measures 9x7mm and the other gems measure 7x5mm. It is a very pretty necklace with all the shades of blue. A perfect necklace for all formal occasions including your wedding day.