Watches (on the wrist or a chain), rings, cuff-links (as mentioned by another commenter), necklaces (sometimes), probably some brooch or lapel pins. Alternativ

Watches (on the wrist or a chain), rings, cuff-links (as mentioned by another commenter), necklaces (sometimes), probably some brooch or lapel pins. Alternatively, to hell with "acceptable", wear the jewelry you want to wear.