Thank you for viewing! This bracelet uses a large amethyst. This energy bracelet is designed to protect the wearer, promote relaxation, provide a sense of security, aid in restful sleep, and enhance intuition. ◇Product Details◇ Stones Used: ・Amethyst ・Crystal (Quartz) Stone Sizes: 14mm & 12mm Inner Diameter: Approximately 17.5cm Shipping will be via Smart Letter (delivered to your mailbox). This stone bracelet was created in a workshop in Okinawa. I hope it can be a source of strength for those who purchase it. SumeraStone