10K White Gold Pendant-Necklace with Swarovski Cut Blue and White Topaz (3ct tgw) Total Gem Weight: 3 ct tw Settings: 10K White Gold Stones: Blue Topaz and White Topaz 18" White Gold Chain Blue topaz is irradiated, white topaz is heat treated. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free.