SFD:If you know or can measure the diameter, crown height, and table % or table diameter, you can then calculate the crown angle with the correct formula and a scientific calculator. The same holds true for calculating a pavilion angle. You need diameter, pavilion depth %, and if there is anything more than a small culet, culet size.You can also get these calculations automatically with the MSU DiamondCalc program without needing the correct formula or a calculator...I used to have the formula, but have not needed it for a long time. ------------------
David Atlas
Accredited Gem Appraisers