The Emerald shape is available in different length and width ratios. The Emerald shape is for those who prefer either a very rectangular look (achieved with a 1:1.5 length-to-width ratio) or a chunkier look (achieved with a 1:1.35 length-to-width ratio). The Emerald is step-cut, so color and imperfections are easier to detect than in a brilliant-cut diamond.