Material: Kyanite Silica 8mm Origin: Brazil Size: Approximately 8mm (±0.5mm) Wrist size: Approximately 16.5cm (elastic) Weight: Approximately 21g Features/Meaning: Elegant with a glossy sheen. You can see plenty of the bamboo-like fibrous texture that is characteristic of kyanite silica. The color is a refreshing indigo blue that blends well with the skin. Kyanite is known in Japanese as 藍晶石 (ranshoseki), meaning "blue crystal stone." Among kyanite, those with vivid color, good color development, and transparency are of higher quality. When you observe kyanite closely, you can see many lines, which appear as layers of crystals in a certain direction, overlapping many times. The hardness changes depending on the direction from which force is applied to these layers. Due to this property, it is called "Disthene," making it very difficult to process. The word "kyanite" comes from the Greek word "kyanos," meaning "blue." Product number: BG6127-8