Synthetic Alexandrite in sterling silver jewelry acts green in natural light and red under artificial light 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 Simulated Color Change Alexandrite 925 Sterling Silver Triquetra Celtic Knot Pendant with 18 Inch Necklace, is shipped with anti-tarnish protection in reinforced gift boxes & satin-style pouches; guarantee far-outlasting competitors Synthetic Alexandrite Color-Change gems possess the same properties as natural gems; they only differ in that they are grown in a controlled environment Silvershake Simulated Color Change Alexandrite 925 Sterling Silver Triquetra Celtic Knot Pendant with 18 Inch Necklace