There's plenty of DIY potential in dollhouse furniture if you like kitsch and know what to look for. All you need are earring hooks, adjustable ring bases, and a few pairs of jewelry-making pliers. And superglue. You should always have superglue in the house.
These were a cinch to make: I just attached the hooks to the loops on the tray.
Here are a few rings I got at a design market a few years ago. These would be easy to DIY, too. I think they're just glued on. These are a bit Lolita-y, but I like that.
I saw these frames at a craft store and just had to make them into earrings. I'd love to swap the pictures for something more sci-fi, but the darn things don't open. Well, that guy looks a bit like Lovecraft, right?