Natural Stone Ear Cuff This design is perfect for adding a touch of glamour to even the simplest outfits. There is no specification sheet. I'm sorry, but the material of the metal parts is unknown! It seems that the natural stones used are Incarose, Rose Quartz, and Crystal. Brand new, unused (I received it as a gift but haven't used it). For those who are looking for one, please consider it. Please understand that this item is stored at home by a private individual before making a purchase.