This 1 carat Moissanite Round Pendant Chain Necklace comes with a certificate of stone properties for any pieces over 0.3 carats. A limited warranty is also included, and please feel free to contact us with any concerns about your purchase. Style: Ghost mannequin; Material: 925 sterling silver, moissanite, rhodium-plated, zircon (accent stones); Care: Avoid wearing during exercise, as the combination of sweat and jewelry can result in silver chloride and copper sulfide. Imported Product measurements: Chain length: 16 in, Extension chain length: 2 in, Moissanite: 1 carat.