Czechoslovakian Uranium Glass Glow Glass Beads, Aqua Blue & Green, Slicer Shape (1950s) 14 x 10 mm. Transparent uranium glass, with yellow or green hues, began to be produced in the 1830s. When uranium glass is illuminated in complete darkness with an ultraviolet lamp (also known as a black light), it glows a mysterious green and fluoresces.
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