pro·por·tion | prə-ˈpȯr-shən
noun
A mathematical representation of a gemstone's overall symmetry
Proportions are the mathematical representation of gemstone’s surfaces and overall symmetry based on the type of cut that is used. For a diamond, there are several elements that need to be properly proportioned based on the cut, including table size, star length, crown height, crown angle, pavilion angle, total depth, pavilion depth, girdle thickness, lower girdle facet length, and the culet. These are all elements that are carefully measured and managed by the cutter of a gemstone to ensure it matches not only industry standards for a specific type of stone cut, but also the practical application of the stone being cut.
