Depth percentage
depth per·cent·age | ˈdepth pər-ˈsen-tij
noun
The measurement of a gemstone's depth (top to bottom) in relation to its diameter
The depth percentage is mainly responsible for refraction. This produces the overall zeal, or sparkle, in a gemstone. To learn the depth percentage of gemstone or diamond, divide the physical depth measurement by its width. Furthermore, an important aspect in learning the depth percentage of a gemstone or diamond, is understanding the term “table”. Tables, by and far, are measured in percentages. For example, it’s best not to divide the overall wide of the diamond with the width of the table. These percentages are especially useful when you’re assessing diamonds of many carat sizes, as you are sure to learn the most ideal cut at any size. Truly, any depth percentage between fifty and sixty-nine percent is considered decent. On the other hand, a percentage between sixty and fifty-four percent is most ideal. At this more ideal size, the table is big enough to permit light to enter the stone at optimal angles so it’s able to reflect off of the smaller facets.