Material: MIX Fluorite 15-17x12-13mm Origin: USA Size: Approximately 15-17x12-13mm (±0.5mm) Wrist size: Approximately 16cm (elastic) Weight: Approximately 47g Features/Meaning: We have received a gorgeous bracelet with a multi-color type! The cut is beautiful, and it is recommended as a material for accessories. Fluorite is called "Hotaru-ishi" (蛍石, meaning "firefly stone") in Japanese, and it has the property of emitting light when heated or exposed to ultraviolet light, which is why it is called firefly stone. Because this phenomenon of emitting light was first discovered in fluorite, the phenomenon of fluorescence came to be called "fluorescence." The English name "fluorite" comes from the Latin word "fluere," which means "to flow." Fluorite has a variety of transparent colors such as purple, blue, green, yellow, pink, and colorless, and it is a fantastic stone. Some stones have multiple colors, called "rainbow fluorite." Item No. BG6102-2