With something like earrings, I'd have to be pretty specific. I like to browse and get ideas, so I normally start with general search terms like Scarf or Wallet, but Earrings is simply too big. I'd look at style and material, most likely. Words like African and Bead come to mind, but also, you might try tags like Colorful Earrings. For people who browse, we might try that as a keyword, looking to knock out the more typical silver and gold jewelry from the search. If you do use Colorful Earrings on a piece or two, you might want to have Earrings for Women as a tag as well, for someone trying to look at color without pages of kids' jewelry.