Eternity rings physically have the advantage of always looking "right" because the gemstones completely circle the ring. This is the continuity of your love symbolized by the circular band and further emphasized by the circle of stones. For this reason, these rings make a wonderful choice for wedding bands.
There is a rich history behind these rings. It is believed they were first made and worn by the ancient Egyptians. The rings consisted of a band of metal with stones equally spaced around it. The stones could be separated with some type of decoration between, or stones set to make the entire circle. These early rings symbolized the eternal love lasting through the eternal life Egyptians believed in. The unbreakable circle made of precious metal represented never ending love and trust throughout life. The addition of valued stones not only accentuated the beauty of the ring, but indicated the precious love that would last throughout this life and into the next.
The stones on earlier rings were set only halfway around the circle (a half eternity ring.) They often came fashioned in the form of a snake swallowing its tail. This also symbolized the circle of love and life as something eternal. When stones were added, they were "flush mounted." The stone was embedded at the same height as the metal band making the ring comfortable to wear no matter where the stone sat in regard to the fingers. Protruding stones would have irritated when they rested between fingers.
Diamonds also represent eternity as one of the most beautiful and strongest substances formed over a long period of time (eternity.) They signify loyalty, fidelity, eternal friendship, and undying love and devotion. These qualities have made them the perfect symbol promising an eternal life of togetherness. The use of diamonds on these rings represent all the things the stones symbolize with their qualities embedded in an eternal circle, magnifying the meaning of the ring's unending beauty.