This bracelet combines Auralite 23, which features 23 different minerals, with chalcedony and crystal. Auralite 23: Approximately 15mm Crystal: Approximately 10mm Chalcedony: Approximately 7mm Inner Diameter: Approximately 16cm ☆ Powerful purification effect. ☆ Guides you to relax both physically and mentally, promoting restful sleep. ☆ Deepens spiritual awareness. Please note that as these are natural stones, there may be cracks, small chips, and imperfections. Thank you for your understanding. The bracelet will be cleansed with crystal and white sage before shipping. Thank you for viewing.