It all begins with the engagement ring, when two partners take the vow to wed. This beautiful custom is coming back, whereas the roots for it go back to the time of the cave people. The first diamond engagement rings were first recorded in ancient Greece. Most of us think that the shape of the ring is what it is because of the shape of the finger, but it is not so. The shape comes from the circle, signifying eternal love, which does not end. Today the most popular among the enamoured rings are diamond engagement rings, which signify the symbol of love and eternity.