The listing, Vaseline Glass Duck has ended.
Definition of Vaseline Glass: Vaseline Glass is a particular color of yellow-green glass that is made by adding 2% Uranium Dioxide to the ingredients when the glass formula is made. The addition of the Uranium Dioxide makes the glass color yellow-green. Vaseline Glass is ALWAYS verifiable by using an ultraviolet light (blacklight) on the glass item. When this is done, the glass turns a bright florescent green! Sometimes, even the most trained eye can be fooled by a piece of glass that looks like Vaseline Glass, but will not 'glow' or fluoresce bright green under a blacklight.