Diamond studs … if it’s not solitaires but a cluster of smaller stones the budget might cover it
Or a sapphire/emerald if that’s more your style
What I really would do is spend £10 on lox brand earring backs, which secure them and are really worth it
PS- I spent similar to that (each) on 2 pairs about 15 years ago (when I was richer ! 😂)
If I’m not wearing one it’s the other so worth the money. A diamond cluster and a diamond hoop