Our 'Mystic Fire Topaz' sterling silver jewelry is certified genuine by U.S. patent numbers; 5,853,826 / 6,997,014 / 7,137,275 and 7,526,928 A Triquetra Celtic knot pendant made from sterling silver is a historical treasure symbolizing interconnectivity and prized from selected ancient culture, which in turn have been rooted in thousands of years of culture and custom Silvershake Mystic Fire Topaz 925 Sterling Silver Triquetra Celtic Knot Pendant with 18 Inch Chain Necklace, is shipped with anti-tarnish protection in reinforced gift boxes & satin-style pouches; guarantee far-outlasting competitors Dazzling rainbow Mystic Topaz is a combination of Natural Topaz, slightly softer than diamond, fused with Titanium, used to make jet aeroplanes; Mystic Topaz is one tough gemstone! Silvershake Mystic Fire Topaz 925 Sterling Silver Triquetra Celtic Knot Pendant with 18 Inch Chain Necklace