Does Bella Swan wear a ring?

Yes, she does. If you would like the full story, look below. But be careful, there is a spoiler alert.

*WARNING! SPOILER ALERT!*

*THERE IS A MAJOR SPOILER ALERT FOR THE TWILIGHT SAGA SERIES BELOW THIS WARNING!*

Edward proposes to her in Eclipse, but she doesn't wear the ring very much. At the beginning of Breaking Dawn, that's when she starts wearing her engagement ring permanantly.