24kt Gold Layered Chain and Pendant by Olympia Gold referred to as Permagold. LIFETIME GUARANTEE and NEVER WORN – HAS TAGS. They "bond 24kt gold to an inner base of high quality, polished diamond cut jewelers metal. We then seal our jewelry with our exclusive anti tarnish coating. Olympia Gold offers an unconditional lifetime guarantee for your customers with our gold layered jewelry. Permagold is our exclusive crystal clear coating that is layered over our gold and silver layered jewelry and then baked in an oven at 400 degrees, to create a protective shield. Permagold protects our jewelry while adding a beautiful shine and luster." According to their website
"Olympia Gold uses a unique process to manufacture our beautiful fashion jewelry where quality is our first priority. All our gold and silver thickness is X-Ray Fluorescence tested.