Thank you for viewing. This is a natural stone bracelet using Kyanite, Blue Green Kyanite, Ice Kyanite, Iolite, and Iris Quartz. The center Kyanite is approximately 9mm in size, The back Kyanite is approximately 8mm, The Blue Green Kyanite next to the center is approximately 6.5mm, The Ice Kyanite next to that is approximately 7mm, The darker colored Iolite on the sides and back is approximately 6mm, The lighter colored Iolite is approximately 5.5mm, The Iris Quartz is approximately 6mm, And the small Kyanite beads are about 5mm. The inner diameter of the bracelet is approximately 16cm to 16.5cm. *Please note that there may be some errors due to amateur measurements. We try to photograph the bracelet to reflect the actual colors as closely as possible. Please understand that the appearance may vary slightly depending on your device. Due to the nature of natural stones, there may be inclusions, cracks, chips, dents, black spots, discoloration, etc., and there may be slight variations in size and weight. Please understand. Please refrain from purchasing if you suspect the item is fake, if you are overly concerned with minor details, or if you are seeking perfection. To prevent swapping, we cannot accept returns or refunds for reasons such as a different size or a different impression after purchase. Please purchase with your understanding. Size adjustments are possible. If the inner diameter is made smaller, the extra beads will be separated into a small bag and packaged with the bracelet. If the size is increased, crystal beads will be added for adjustment. The photos represent the current condition of the item, so please be sure to check them carefully before purchasing. Silent purchase is possible. If you have any questions, please ask before purchasing. High quality, transparency, blue, azure