An engagement ring is a ring indicating that the person wearing it is engaged to be married, especially in Western cultures. In Western countries, engagement rings are worn mostly by women, and rings can feature diamonds or other gemstones. In some other cultures men and women wear matching rings. In some cultures, engagement rings are also used as wedding rings.
The woman's ring is presented as an engagement gift by a man to his prospective spouse while he proposes marriage or directly after she accepts his marriage proposal. It represents a formal agreement to future marriage.