Ultraviolet Light are electromagnetic waves which originate from solar radiation received from the light of the sun. UV Rays can also be synthesized with specialized lamps, blacklights, and tanning lamps. UV Rays has wavelengths of 10nm (30PHz) to 380nm (750THz), which is longer than X-Rays, but shorter than the wavelengths of visible light. Under certain wavelengths, Ultraviolet Light can cause some elements, minerals, and other substances to give off a glow or fluorescent look. A prime example is the mineral, Benitoite, which is commonly a blue colored mineral. Under shortwave Ultraviolet Light, Benitoite will become fluorescent, and give off a bright blue, to white-blue color. When under long wave Ultraviolet Light, the Benitoite will glow from either an almost clear or white color, or a reddish color. Ultraviolet, due to the different wavelengths and radiation it gives off, can be harmful to humans, as it can cause skin damage, freckling, and sunburns. Despite the negative side-effects of long-term exposure to UV Rays, it also has some beneficial effects – it provides Vitamin D to the human body, which is what strengthens the bones. With different forms of technology, Ultraviolet Light can be used in different ways. Particularly, Ultraviolet Light can be created from lasers, in which it can be used for many different purposes, such as in dermatology, dentistry, chemistry, integrated circuits, and even laser engraving.