1/2ct Amethyst Cross Pendant in Sterling Silver With 18 Inch Necklace 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. Amethyst is a member of the quartz family. Amethyst sold by SuperJeweler is natural and not treated.