This is a powerful, large sapphire. Although there are some blackish parts, you can see a beautiful, transparent blue. This has been impregnation treated, but it's a very attractive large blue stone! *;:*:;:*:;:*:;:*:;:*:;:*:;:* Directly imported natural stones from around the world! The stone-loving shop owner makes unique purchases, and we have a selection of rare stones that are hard to find in Japan. We will hold auctions from time to time. Please take your time to browse. (^^) *:;:*:;:*:;:*:;:*:;:*:;:*:;:* ★ Bracelet Size Guide 7.5mm or less: Approximately 15-15.5cm 8-9.5mm: Approximately 15.5-16.5cm 10-11.5mm: Approximately 16-17cm 12mm or more: Approximately 17-17.5cm Resizing is possible. Please comment before purchasing. Additional charges will apply if the number of beads increases. ★ Please note that due to the nature of natural stones, there may be some scratches, dents, and inclusions. ★ Due to the nature of online sales, there may be differences in color depending on the screen's color tone. Please understand that there may be some differences from the image. ★ In the event of an initial defect (damage, broken elastic, etc.) or a different item, we will take care of it. Please contact us within one week of arrival. Color...Navy系