Fluorite 8mm Green Ice Chalcedony 8mm are used to create this. Fluorite is sometimes called the "stone of genius," and it activates the brain, broadens the scope of thought, and is also ideal as a charm for exams. It is also a stone that helps solve problems, and for those who have worries or doubts, it purifies energy as if clearing the fog in front of them, and it is also a stone that illuminates the clues to a solution like a lighthouse showing the way. Green Chalcedony is said to have the effect of stabilizing the mind and reducing stress. As a stone that symbolizes harmony with nature, inner peace, and mental stability, it is said to bring relaxation and healing. The inner diameter of the bracelet is about 15cm. It is made with 4 strands of Ope-lon rubber. It will be delivered after being purified with a crystal cluster. Thank you for viewing.