What makes it unique diamond wedding rings is the person who leads and has a view and considers that the engagement ring she wears is unique. Diamond engagement rings are in demand, common but popular with other precious stones when it comes to engagement rings or wedding. Than as engagement rings where the diamond is a symbol of pure love and fidelity. While some couples prefer more contemporary and unique designs, the most common types of engagement ring are the classic solitaire setting, the side-stone setting and the three-stone setting.