Inner diameter: approximately 16.3 cm Bead size: approximately 16mm - 16.5mm Please allow for some margin of error. ⚠ The actual color is closer to images 10 and 11. Identified from the same lot. I purchased this under the name "Sagenitic Quartz Rabbit Hair Group," but I was concerned, so I sent it to an identification institution. Mineral name: Natural quartz Gemstone name: Spherulitic Dumortierite in Quartz A very small amount of iridescence agent was used on the bracelet that was sent for identification. A bright green color is attached to the beads, which can be confirmed visually. There were 2 or 3 beads on the bracelet that was sent for identification, but none were found on this bracelet. I was told on the phone by the identification institution that if a lot of iridescence agent is used, it will be noted as coloring on the identification report. This stone has a lovely color of dumortierite and cute inclusions. As it is a natural stone, there may be cracks, inclusions, natural dents, black spots, color unevenness, fine scratches, etc. Natural stone Natural stone bracelet Design bracelet Dumortierite in quartz Rare stone Power stone