Peridot, the gem variety of Olivine, gets its splendid play of color from a mixture of magnesium and iron Pendants with Celtic basic knots, from the Celt culture, date back over 2,500 years before Christianity Silvershake 1.32ct. Natural Peridot 925 Sterling Silver Celtic Knot Solitaire Pendant with 18 Inch Chain Necklace, is shipped with anti-tarnish protection in reinforced gift boxes & satin-style pouches; guarantee far-outlasting competitors Did you know August’s birthstone, Peridot, was called the ‘evening emerald’ for its glow increasing as darkness descends Silvershake 1.32ct. Natural Peridot 925 Sterling Silver Celtic Knot Solitaire Pendant with 18 Inch Chain Necklace