Necklace featuring a Swarovski Zirconia set M initial pendant Each initial pendant is platinum plated .925 sterling silver Pendant is suspended from 18" cable chain with 2" extender Each Swarovski Zirconia is Laser Engraved as a seal of authenticity and guarantees the highest quality diamond simulant in the world Imported These silver pieces are built for longevity. This piece features a metal plating or flashing, or an electrocoating for a more lustrous appearance, but it can wear off with long-term or heavy use. To ensure the longevity of your plated items store your jewelry in a dark, cool, dry place such as a pouch or air tight box and avoid rubbing plated items together. Also try to avoid exposure to cleaning products and perfume which can both negatively affect your items. Your local jeweler can advise you where to send your jewelry if you would ever like them replated.