15 Carat Peridot and Diamond Tennis Bracelet in Sterling Silver, 7 Inches Crafted In Solid Sterling Silver 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. SuperJeweler offers free shipping in the United States, Canada, the United Kingdom, Australia and almost every country. Peridot is a member of the forsterite-fayalite mineral series. There are no know enhancements of peridot to improve its color or clarity. SuperJeweler sells natural, untreated peridot.