7mm Four UV Reactive Uranium Glass Round Cabochons

Four Cabochons

Size: 7mm x 7mm

No chips No cracks

Reactive under 395nm

PLEASE NOTE: Color of glass and glow may vary slightly from photographs due to variations in screen hues and nm of black light used to produce glow. — The type of Ultraviolet light and the color of visible light is determined by its wavelength. The unit of measurement for light wavelengths is the nanometer (nm). Ultraviolet light is generally considered to be from 200 nm to 400 nm.