Edwardian Cushion Sapphire & Halo Diamond Engagement RingThis Edwardian cushion sapphire halo diamond engagement ring is from the turn of the century. The 2. 57 carat cushion cut center sapphire is simply stunning with its navy blue tone and is full of life. The center stone is surrounded by a cluster of ten (10) old european cut diamonds which provide a stunning contrast of color. The top of the mounting is finished in platinum, while the bottom half of the mounting is a buttery 18k yellow gold. The under