Blue Topaz and Diamond Tennis Bracelet in Sterling Silver 7 inches 20ct tw. Crafted In Solid Sterling Silver SuperJeweler offers free shipping in the United States, Canada, the United Kingdom, Australia and almost every country. All purchases from SuperJeweler come with The SuperJeweler Lifetime Guarantee. Your SuperJeweler jewelry purchase includes a lifetime guarantee against the loss of side stones or damage to the jewelry's setting or center stone. It also includes a one-year replacement guarantee against the loss of your jewelry's center stone. Blue topaz is a member of the topaz gemstone family. While blue topaz occurs naturally, most blue topaz on the market today is made from white topaz that is irradiated to become a blue color. This process produces a gemstone that is a from sky blue to dark sky blue in color, sometimes showing a greenish blue, and is not harmful to wear. All blue topaz that SuperJeweler sells is irradiated.