On purchase of an engagement ring, a buyer may be looking for a pairing wedding band. If his/her experience with engagement ring purchase is good with your jewelry website, the buyer may certainly re-visit to pick a matching wedding band.
Alternatively, buyers who already have purchased an engagement ring from another website may be looking for better matching band options on your website
Both the scenarios create an excellent opportunity for upselling Wedding bands
Buyer's Journey to purchase a matching wedding Bands