Old Cream Jar
To the untrained eye, this thing looks like a simple jar. That’s because it is. However, what made the OP post this ordinary-looking jar on the internet was how there appeared to be yellowish stuff in and on the jar when exposed to UV light. Is it possible that this jar once contained uranium?
Nope, uranium doesn’t glow yellow under UV light, or so we’re told. This jar might have once contained a facial cream or jelly. This idea is further supported by the fact that manganese glows yellow to yellowish-green under UV light. So, yeah, the OP has a jar of regular old facial cream on their hands.