■ Product Name: Hokkaido Kaminokuni Town Black Silica Bracelet ■ Product ID: T325-5193 ■ Product Weight: Approximately 17.4g ■ Product Size: Inner circumference approximately: 160mm (±5mm) Bead diameter approximately: 8mm (±0.5mm) to 9mm (±0.5mm) 【Black Silica (Graphite Silica Stone)】 Black silica is a mineral formed by the mixture of graphite and silica stone, and it is a rare mineral that is only produced in the Tenkawa upstream area of the Kamiyoshi district in Kaminokuni Town, Hokkaido, the only place in the world. The Kamiyoshi district, where it is produced, is considered a sacred place where the Ainu people performed rituals, and ritual implements used in ceremonies have also been discovered. Black silica, also known as "Shinmei Stone" after the place of origin, is said to possess special powers because it is produced in a sacred place. It is said that in ancient times, people used black silica as a "stone where gods reside" and a "stone that relieves pain" for treating illnesses. Black silica is said to emit far-infrared rays semi-permanently at room temperature, and the far-infrared rays emitted by black silica are classified as "growth rays," which have the most beneficial effects on the body. It is a stone that has the effect of expanding microvessels, improving blood flow, activating body tissues, promoting metabolism, and warming the body from the core, so it is especially recommended for those who suffer from chronic stiffness and coldness.