Only 3 percent of the world's diamonds are now emerald cut, but the effect is both striking & beautiful, especially if you love a vintage look. Emerald cut diamonds were hugely popular in the 1930s, especially set in platinum, as the rectangular shape was perfect for the bold, new geometric patterns that came into vogue following the “ Exposition Internationale des Arts Décoratifs et Industriels Modernes” in Paris in 1925 where ' Art Deco' took the world by storm. Emerald cut diamonds have lower refraction than brilliant cut stones but they have better reflection & show off the colour & clarity of the stone more. The faceted edges to have some sparkle & the body of the stone will give beautiful flashes of light if it has been well cut. The emerald cut is flattering to the fingers, showing them off at their longest & slimmest. The stone in an emerald cut ring looks larger than a brilliant cut stone of similar carat because the surface area is greater. Look carefully at your ring & make sure you like the height to width ratio, there are theories about what is optimum but nowadays the biggest guideline is really personal taste. The emerald cut is not graded officially when a stone is certified & so choose what you love. Celebrities seem to love an Emerald cut stone, maybe because they look so lovely on.