18k gold plated over 925 Sterling Silver .NOT Silver Plated or Filled, Not Brass or Alloy *100% Brand New *We do Bundle *Lead Free *Nickel Free *Hypoallergenic *Will not Tarnish This is not ordinary cz. Our Simulated Diamond are cut with more facets so the stone can reflect light and shine like real diamond, These superior cutting and polishing techniques are set them apart from the rest.