An emerald cutter will look at the overall shape of the rough stone to understand what is the best kind of shape that can be crafted from it. The goal is to create a shape that avoids wastage and utilizes the maximum amount of the rough gemstone. Round emeralds are popular but can carry a higher premium as they create more rough wastage when being produced.
Other shapes like emerald and cushion are commonly used to craft engagement rings. Emeralds are also popularly cut in the namesake emerald shape, the structure of the emerald crystal lends itself well to being cut in the emerald shape. This cut also creates the least amount of wastage and gives stability to this softer gem. Additionally, emeralds have a deep and rich green color that is shown off beautifully by the open facet of the emerald gemstone.
Emerald brilliance is the amount of life or sparkle that it can exhibit as it is tilted and viewed from different angles. An emerald cutter will ensure that the emerald has even faceting, and sparkle that comes alive due to the precise cutting. While an emerald does not sparkle as much as a diamond, it does have a pleasing sparkle that is created with the presence of light reflecting inside of the emerald. When light penetrates the emerald, a well-cut emerald with symmetrical facets will reflect light out. This will create flashes of brilliance, especially as the emerald is turned from side to side.