Vaseline glass, also known as uranium glass, is a type of colored glass made by adding uranium oxide to the glass mixture. It typically exhibits a vibrant green color and, most notably, glows a bright fluorescent green under ultraviolet (UV) light. This unique property made it a popular choice for tableware, decorative items, and jewelry, particularly during the late Victorian era and the early to mid-20th century.

The use of uranium in glass dates back to the mid-19th century, with its peak popularity occurring between the 1880s and the 1940s. While the uranium content is very low and considered safe, its presence gives the glass its distinctive glow and color. Today, Vaseline glass is highly sought after by collectors for its aesthetic appeal and its fascinating chemical properties.