Discovered in 1789, uranium’s first use was purely decorative. Its luminescence made it a perfect addition to glass. Around 2% of the mix was made up of it which caused it to glow under a black light while still being safe (the majority of pieces anyway)…. Not that they knew anything about that part, they just lucked out. The colors range from an almost clear yellowish green (think vitamin pee) to a more robust green. The lighter toned ones were called “Vaseline glass” because their color resemb