Composite ring made in two pieces--an inner band and an outer band. In this case, the inner band is made of 18K rose gold and the outer band is made of mixed metals: gold, copper and silver that have been fused together.
The edges of the inner band are then raised up and against the outer band, holding it in place securely and giving the ring great rigidity. As an added bonus, the edges of the ring are rounded for comfort fit.
Each ring is unique, but similar designs can be produced for matching pairs suitable for wedding rings.