If you have a desired inner circumference, please be sure to let us know before purchasing. It will cost an additional 50 yen for every 1 cm increase. Reducing the size is free. Inner circumference: Approximately 16cm (stretches) Five-claw emperor dragon carved rock crystal (approx. 12mm) Black onyx (approx. 10mm) Hematite (approx. 8mm) Cut crystal *The number of stones may vary depending on the size. ◆Onyx Said to be a "stone that protects against evil spirits," it is believed to awaken the instincts within the body and stimulate and improve athletic ability. ◆Hematite A metallic, heavy crystal mainly composed of iron. The word "hema" in Greek means "blood." The name comes from the fact that the fragments are red when cut. This stone, which has been highly valued as a talisman in ancient times, seems to have the power to ward off danger and disaster and bring victory. It is also recommended for those who want to achieve victory in sports or business. ◆Rock Crystal It is said to be a versatile power stone that corresponds to all situations, places, and events. It is said to awaken and awaken potential abilities and power. *Due to the nature of natural stones, the color and pattern may vary even in the same stone. *Colors may differ from the actual product due to lighting conditions. In addition, natural materials may have cracks and inclusions. Please understand this in advance.