This is a natural stone bracelet. It's made of crystal quartz. I was fascinated by power stones for a while and bought them at specialty stores, but I never wore them. When I moved, I had something like a certificate of authenticity or a quality guarantee, but I lost it. m(__)m If that's okay, please use it. It's unused. Many of them are old stock purchased from a long-established store that has been in business for over 100 years, and some are now rare. Some were purchased from stone wholesalers who do the buying. Size adjustments are not possible, so please disassemble and reassemble it yourself. The image is a jewelry case for photography, and the small stones inside are for purification, such as rose quartz and amethyst, but they are not included, so please be aware of this. I'm experimenting with various packaging methods to prevent scratches during shipping. I'm using cases and other methods, so it may be difficult to open, but I would appreciate your understanding. Inner diameter is 16cm. #PowerStone #Bracelet #Amulet #FreeShipping #CrystalQuartz #Crystal #Citrine #IceLarimar #Fluorite #TigerEye #BrandyCitrine #RedAgate #ColorQuartz