Jadite (sometimes spelled "jadeite") is one of several types of glass made with uranium. Before World War II, when uranium was easier to acquire, glass makers commonly used uranium to create this new shade of green glass. Today, forgeries of older jadite glass can emulate the color without using uranium, so its absence makes it easier to test for counterfeits. Uranium made the glass slightly radioactive, causing it to glow a bright green when exposed to long wave ultra violet light (LWUV), or "black light." To test for uranium, you'll need a source of LWUV, such as a black light lamp or an individual black light bulb such as those found in black light lamps.
Instructions
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1
Set up a room to be as dark as possible, with the only source of light coming from a black light. Place the glass to be tested in the room.
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2
Observe the response of the glass to the black light. Jadite will glow a bright green.
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3
Check the glass for "invisible markings" which show up only under LWUV. While not all jadite will have markings, some will.
