A vintage diamond engagement ring is a beautiful keepsake that celebrates the commitment of two people in love. With its unique features and classic beauty, a vintage diamond ring makes for an emblem of enduring romance and timeless style. Here are some of the key characteristics that make this type of ring so special. Antique-Cut Antique cuts of vintage diamond engagement rings are distinct and unique in their own way. These diamonds have a special 'old-world' charm that truly captures the imagination.