Anybody using classes of GIA cut is wrong and we have the newest sytem. I can get you a deal. Any dealer who makes blanket statements like these is avoiding giving an actual grade for you to compare. Claiming all diamonds are cut well is naive, and false. We use a colorimeter to grade the color on our diamonds.
Colorimeter is a high tech toy to impress customers.
GIA uses color masters and not a colorimeter. Colorimeters can be as much as 3 grades off. There's no difference between an Ideal Cut diamond and regular diamonds. An ideal is exquisitely more beautiful and very rare. This is a feeble attempt to discredit Ideal diamonds.