Carolyn Pollack Sterling Silver Green Gemstone Necklace Genuine Malachite, Nephrite Jade, Chrysoprase, Seraphinite, Aventurine, and .925 Sterling Silver Measures 18" long with Easy to Open Hook & Ring and Snap Closure See Ruler View for accurate sizing. Silver may tarnish over time. Handcrafted in America with lifetime warranty on all jewelry These colorful green gemstones make a beautiful necklace any nature lover will adore.