This product is a natural crystal that produces black spots and cracks during growth and polishing, which are natural phenomena and not defects. Please choose and purchase. The bracelet is designed and handmade by the shop owner, unique and one-of-a-kind. Basic information ：  Bracelet diameter: 1.84 inch(Adjustable bracelet length)Bead diameter:0.30 inchNumber of beads: 13 pieces Color: Crystal and blueMaterial: Natural CrystalWeight: 24.65g  Note: The size is measured manually and there may be slight differences