-18 K gold plated, 25 x more gold than your regular gold plated jewelry - 5 A CZ simulated diamonds that compares to "F" Flawless grade diamonds. Highest grade of simulated diamonds on the market. -Water-resistant -15 inches adjustable to 16 inches with our signature seamless adjustable closure This necklace is made the luxurious way- shine compares to the highest diamond quality and craftsmanship is of the highest standard. Absolutely no difference between this and the real deal.