Because fancy shaped diamond fashion is not symmetrical like a round wedding bands, a broader range of parameters are needed in regards to proportion.
Tiffany Style Diamond experts would never attempt to verify a diamonds color in a setting, and would insist on a certified color comparison before attempting to make a fair evaluation, confirming how difficult differences in color grades are to see.
Never wear a engagement ring when doing rough work. Even though a wedding bands is durable it can be chipped by a hard blow.