Geralt doesn’t wear his courting jewelry—the medallion is apparently a witcher thing, not an omega one—and Jaskier supposes that makes sense. Geralt leads a very active life, and probably saves the jewelry for situations it won’t run the constant risk of getting ruined in. Certainly a nice set of earrings would be a lot more fragile than the plain studs he wears instead. A lot of omegas don’t wear their courting jewelry day to day, anyway, or at least not most of it. Geralt’s hardly unusual in that. It’s a bit of a shame, though, because Jaskier’d like to see him in it.