Terahertz Ore x Luminous Firefly Glass Blue Bracelet 12mm Glow in the Dark Power Stone Inner Diameter 20cm [GOLD STONE] Approx.

---------------------------------------------------------------------- A combination of firefly glass and terahertz popular in Okinawa that glows in the dark ■Size Diameter 12mm (±0.5mm) 20 grains Inner diameter 200mm (±5mm) *16 grains are used in the photo. Firefly glass is a luminous type that emits light in the dark. Craftsmen melt each piece of colored glass and roll it into an iron core, then layer silver leaf on top of the melted glass like starch syrup, creating beautiful colors using a special technique. Terahertz emits terahertz waves that vibrate approximately 1 trillion times per second. ◆Terahertz The secret behind terahertz ore lies in the energy that causes 1 trillion molecular vibrations per second. Terahertz waves (terahertz waves / 1 trillion hertz waves) emitted from terahertz ore are electromagnetic waves that are located between "light sources such as far infrared rays" and "radio waves." The frequency of the terahertz wave is between 1 trillion Hz and 100 trillion Hz, and the wavelength is between 3 μm and 1000 μm, which has the properties of both light and radio waves.