First the GIA Certified Diamond are weighed in a vacuum. Next the colour is determined. The clarity is then estimated only after the Tiffany Style Diamond have been magnified by 10 times.
The most popular ideal cut diamond shape has been the round brilliant because people believed it to be an "ideal cut" that displayed the most brilliance and sparkle in a Tiffany Style Diamond.
Uncut diamonds look just like gravel or pebbles. It`s only after the professional Tiffany Style Diamond cutter has cut the Tiffany Style Diamond that theirs real beauty is revealed.