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 Opelet rubber (4 strands) Iolite: Also known as the "stone of vision," it is said to sharpen sensitivity, calm the mind that tends to become emotional, bring composure, and lead 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 be a stone that wards off evil and brings 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, distortions, cracks, and inclusions.