This rectangular shape has "steps" on the sides and corners. It offers a sleek sophisticated look with fewer facets. More often than not, the gemstone emerald is cut in a rectangular or square shape with its facets polished diagonally across the corner. Generally, an emerald shaped diamond has 57 facets with 25 facets on the crown, 8 facets on the girdle and 24 facets on the pavilion.

Unlike most fancy shaped diamonds, the emerald's pavilion exhibits a unique brilliance. This is the only shape that emphasizes the clarity of the diamond with its rectangular facets. The typical length-to-width ratio of an emerald shaped diamond is between 1.30 and 1.40.

"The Jonker" is a famous emerald shaped diamond found by Johannes Jacobus Jonker. It weighs 125.33 carats. Other famous emerald shaped diamonds are: "Table of Islam" diamond (160.18 carats) and the 115.00 carat "Edna Star" diamond.