Amazonite 9.8mm. Inner circumference is 16.5cm. Adjusting the inner circumference smaller is free, but increasing it to 17cm is +100 yen, and 18cm is +200 yen. ☆ Amazonite ☆ The name "Amazonite" is said to mean "a stone discovered in the Amazon River basin." The Japanese name "Tengaseki" (天河石), also comes from the image of the Amazon River. ☆ Amazonite's Energy ☆ Reduces stress Enhances thinking and creativity Integrates body and mind Improves communication skills Supports soul growth ※ If you wish to combine multiple items, we will discount 100 yen for each item after the second one. ※ Immediate purchase is OK ^o^ We will prioritize those who purchase immediately, even if you are in the middle of commenting. ※ There may be inclusions and dents unique to natural stones. Please understand this as a characteristic of natural stones.