I was set on a 1.76 ct. Princess when my jeweler called me and said he was getting in what was described by the broker he goes through as "an amazing Radiant diamond." He had all the specs besides the Crown Height %. I understand that traditionally, crown height % was calculated by taking the crown height divided by the average diameter (I''ve read that GIA applies this to Radiant Stones and substitutes the width for the diameter). However, I''ve read that the length of the stone, when measuring a radiant shape, should also be taken into consideration. If I calculate the crown height % using the first method, the crown height is 14.9%.
I went and looked at the stone and it was beautiful however, when I put the specs into the chart provided at www.gemappraisers.com for radiant shaped diamonds, it came back as an average cut at 3A. Here are the specs:
These specs result in the following: Table is 2A, Depth is 3A (the chart did not let me input this - it was calculated and came back at 71.7%, which is slightly deeper than the actual measurement of 70.5%), Girdle is 1A, Crown Height is 1A, Polish is 1A and Symmetry is 1A (polish and symmetry are not primary determining factors). So, overall, the diamond would get a 3A, which equates to a U.S. Domestic Average Cut.
To add to my confusion, I found other charts that gave different specs for an ideal to very good cut and this diamond fit in that category.
I''m so confused. Please help!
I went and looked at the stone and it was beautiful however, when I put the specs into the chart provided at www.gemappraisers.com for radiant shaped diamonds, it came back as an average cut at 3A. Here are the specs:
1.76 ct. Radiant
Clarity: SI1
Color: F
6.90 x 6.69 x 4.80 mm
Table: 69%
Crown Height: ?? (estimating somewhere in the 14% range)
Girdle Thickness: Slightly Thick to Thick
Polish/Symmetry: Good/Good
Depth: 70.5%
These specs result in the following: Table is 2A, Depth is 3A (the chart did not let me input this - it was calculated and came back at 71.7%, which is slightly deeper than the actual measurement of 70.5%), Girdle is 1A, Crown Height is 1A, Polish is 1A and Symmetry is 1A (polish and symmetry are not primary determining factors). So, overall, the diamond would get a 3A, which equates to a U.S. Domestic Average Cut.
To add to my confusion, I found other charts that gave different specs for an ideal to very good cut and this diamond fit in that category.
I''m so confused. Please help!