Fluorescent Mineral - UV Reactive - Short Wave Light 1.96 Lbs actually Cool !
This mineral is fluorescent under Short Wave UV light. You must have a SHORT WAVE UV light in order to see the colors.Some rocks contain more and brighter fluorescence than others. What you see will also depend greatly upon the quality and strength of the UV lamp you use. Fluorescent rocks & minerals are illuminated with ultraviolet light. They glow with an remarkable array of vibrant colors - in sharp contrast to the color of the rocks under conditions of normal illumination. These minerals have the ability to temporarily absorb a small amount of light and an instant later release a small amount of light of a different wavelength. This light emission is known as fluorescence. This change in wavelength causes a temporary color change of the mineral in the eye of a human observer. The color change of fluorescent minerals is most spectacular when they are illuminated in darkness by ultraviolet light