Thank you for viewing! ◎ I hope this power stone will encourage you in some way. ◎ If you are interested in this stone, or if this product has caught your eye, I believe it is fate. Iolite: Approximately 5.5mm Crystal: Approximately 8mm, Approximately 6mm Cut Button Purified. Inner diameter: Approximately 16cm Uses transparent Ope-lon rubber (4 strands) Iolite: Also known as the "stone of vision," it is said to sharpen sensitivity, calm emotionally charged hearts, bring composure, and guide you to fundamental solutions. It is also said to bring stability to the heart, remove anxiety, and provide peace. Crystal: It is said to be a power stone that is compatible with anything. It is said to ward off evil and bring good luck. Crystal symbolizes purity and innocence, cleanses the mind and body, activates vitality, and awakens potential and talent. As this is handmade, we appreciate your understanding. Also, as natural stones are used, please understand that there may be variations in color and shape, as well as imperfections, cracks, and inclusions.