Inner diameter: approximately 17 cm Bead size: approximately 12.5 mm - 12.8 mm Please note that there may be slight variations. ⚠ Some images show a deep blue color. Image 1 is the closest color to the actual product. No appraisal certificate included! The color is darker than item ① currently on sale, but the grade is lower due to fewer inclusions. Appraisal completed. Please check images 11, 13, and 14. Colored material is used. There are small holes in the quartz, and the colored material is used to fill and seal them. The colored material is colored, and if a large amount is used, it will be identified as dyed, but in this case, it is considered natural quartz because the amount used is small (trace amounts). Please check image 12. (This is not from the beads incorporated in this bracelet) Almost none are present, but they are rarely seen. Other than that, the color and inclusions are natural. Spherulitic Spherical Dumortierite in a pale blue color is included in a granular form, making it cute and rare. As this is a natural stone, there may be cracks, inclusions, natural dents, black spots, color unevenness, and fine scratches. Natural stone Natural stone bracelet Dumortierite in quartz Spherulitic Dumortierite in quartz Rare stone Power stone