To determine the coefficient value, divide the length on the diamond by its width, and then locate underneath the value that may be closest to The end result you bought: Here is a conversion desk made up of carat estimates for some of the popular emerald Slice size-width combos. https://podcasters.spotify.com/pod/show/caratone/episodes/Dazzling-Heights-Exploring-the-World-of-4-Carat-Diamond-Rings-e2he2o3?