925 sterling silver diamond cut overlapping arch design ring with a gorgeous faceted solitaire inverted pear peridot stone. The stone set in the middle measures 3/16 inch wide at the widest point. It is available in sizes 6, 7, and 8. Peridot is the rare gem-quality variety of the common mineral olivine, which forms deep inside the Earth’s mantle and is brought to the surface by volcanoes. Rarely, peridot is also found inside meteorites. Peridot is the birthstone for August.