em·er·ald cut | ˈem-rəld kət
A type of shape and cut, emphasizing long parallel step cuts with clipped corners to create an octagon shape
Although most often rectangular, a square variation exists, known as a square emerald cut. The emerald cut has rows (steps) of elongated facets on the crown and pavilion, parallel to the girdle, with sets on each of four sides and at the corners.
Although the number of rows or steps may vary, the usual number is three on the crown and three on the pavilion.
The emerald cut is seldom used for diamonds in the intermediate color grades, since it tends to emphasize color. It is excellent for colorless stones and cases where it is desirable to emphasize the color of fancy colors.