 |
 |
 |
| PRINCESS DIAMOND FACET DIAGRAM | RECTANGULAR PRINCESS FACET DIAGRAM | PRINCESS DIAMOND |
CUT GRADE DETERMINANTS FOR PRINCESS CUT DIAMONDS
| CUT CLASSES |
1A |
1B |
2A |
2B |
3A |
3B |
4A |
4B
|
| Ideal |
Premium |
International fine trade |
US domestic average |
below average |
||||
| Table % |
62%-68% |
60%-72% |
59%-74% |
58%-78% |
56%-82% |
53%-85% |
50%-88% |
>88% <50% |
| Crown Height % |
10-15% |
8.5-16% |
8-16.9% |
6-18% |
5-19% |
4-19.9% |
3-20.9% |
<3% >21% |
| Girdle thickness Word descriptions and percentages. |
Very Thin to Slightly Thick (0.4%-4.5%) or Thin to Thick (1.0%-5.5%) |
Very Thin to Thick (0.4-5.5%) |
Very Thin to Very Thick (0.4%-7%) |
Extremely thin to Extremely thick (0% to > 7%) |
||||
| Total Depth % |
64%-75% | 58%-80% |
57%-83% |
56%-84% |
53%-85% |
>85% <53% |
||
| Polish/Symmetry Not a primary determining factor. |
Excellent to Good |
Good or Fair |
Poor to Fair |
|||||
| Square range Length/Width ratios Preferences only |
0.95-1.05 |
|||||||
| Rectangular range Length/Width ratios Preferences only |
1.5-1.75 |
1.49-1.06 1.76-1.99 |
> Class 3 < Class 3 |
|||||
