Material: Massive Banded Fluorite 11.5mm Origin: Russia Size: Approximately 11.5mm (±0.5mm) Wrist Size: Approximately 17cm (elastic) Weight: Approximately 43g Features and Meaning: This is a new type of fluorite discovered in Russia. As it is a recently discovered natural stone, it is still rare and not widely available. It has a gentle impression with a multi-colored milky purple hue. It is also characterized by a striped pattern (banded) created by shades of purple. Fluorite is called "Hotaru-ishi" (蛍石, 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 is a fantastic stone. Some stones have multiple colors, called "rainbow fluorite." Item No. BG5747-115