Vaseline Glass, (also known as Uranium glass) is an extremely rare yellow-green colored glass that was very popular for a century or so, up until the 1920’s. The strikingly beautiful color also glows slightly under any ultraviolet light. As little as 0.1 to 0.2 percent of uranium dioxide is added to the formula of glass to give it the yellow-green tint, according to Vaseline Glass Collectors Inc.
This rare glass got the nickname “Vaseline” because of the resemblance of some pieces to the hue of Vaseline petroleum jelly, which is light yellow in color. One of the rare qualities of this glass is that the color of a piece can actually vary to the naked eye under different light sources.
One collector in Philadelphia built this beautiful Zen Garden around his Vaseline Box Buddha. When it’s lit up at night you can see it from Ben Franklin Bridge, miles away!