Sapphire Cross Pendant in Sterling Silver, 18" Necklace, 1/2ct tgw. 18 Inch Chain 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. Sapphire, a member of the corundum family of gemstones, is blue in color, from cornflower blue Ceylon sapphires,to dark blue Australian sapphires, to right royal blue Burmese sapphires. Most common treatment for the enhancement of color is heat treating. In the heat treating process, rough un-cut sapphires are heated to 1700-1800 degrees Celsius, which improves both color and clarity. All sapphires that SuperJeweler sells are heat treated for the enhancement of blue color and clarity.