Depth share: In aiming to quantify a gem’s proportions, reference is frequently made to depth proportion. This really is calculated by getting the depth and dividing it through the girdle diameter (or average diameter, in the case of non-round stones). The appropriate vary is usually 60–80%. The term "saturation" could https://www.gemsbiz.com/blog/explore/a-guide-on-diamond-quality-grading-parameters