My first try to make an earring holder for my girlfriend didn't end up being very useful, the reason being that the display/holder didn't have room for the earring lock, and it didn't fit looped earrings, so I gave it another go and, here's what I came up with.

It's modular, meaning you can keep adding levels and you can remove individual beams.

There's still another kind of earring that requires a different sort of holder, and I intend to create one for those kinds.