Size: Approximately 8.5mm Inner Diameter: Approximately 17cm Appraisal certificate included. ★ Absolutely the highest rank! Due to the popularity of this item, please be sure to comment before purchasing. Actinolite in Quartz Bracelet Japanese name: This bracelet contains green actinolite within natural quartz. This is the ultimate grade. The green actinolite spreads like a mist in fibrous form, creating beautiful beads. I believe it is difficult to obtain this grade. The mining of actinolite in quartz is also decreasing, and the number of companies that specifically search for and mine it to process into beads is also decreasing. I don't think beads with such uniform actinolite inclusions as this bracelet, which are worthy of appreciation, will appear again.