Review Of Glass That Glows Under Black Light References. Everyone who collects vaseline glass knows it’s got uranium in it, which means everyone who comes in contact with vaseline glass understands they’re being irradiated. Under black light, certain colors will glow and appear brighter than others.

People often use the black light test thinking it guarantees authenticity. These colors are known as fluorescent or phosphorescent colors. Web uranium glass can be many different colors, and each color has a different name, such as jade glass or vaseline glass, but to make sure it’s true uranium glass, it needs to be put under a uv light.