Cut Nut:
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It is a very nice diamond.
The crown variance is about 1/5th as critical as pavilion variance - nothing to worry about.
I would be happy to sell or buy the stone
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Thank you Garry
Robin & Todd Gray, NiceIce:
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“The pavilion facets seem to be cut within a really tight tolerance, but the crown facets are pretty far out of whack in terms of their tolerance... This is actually an excellent example of Fred's "warped theory"... “
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Rhino,
GoodOldGold:
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“However the variations I see at the arrow shafts indicate that you may indeed have a wacky hearts pattern. Is this being sold as an H&A?”
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Madam and Gentlemen!
I don’t think there is anything wrong with this stone, in my professional opinion the hearts look pretty good to me, a standard that is consistent with A Cut Above whether from the new line or the old. Perfect H&A image is a guarantee that all the facets of the stone are in correct optical alignment.
Pavilion angle is the most important when it comes to the Hearts or the Arrows. Forgive me for been harsh (no disrespect was meant!) but your comments show a small gap in your knowledge when it comes to the art of Diamond Cut. Allow me to give you a couple of lessons.
Lesson 1: I believe Garry and Sergey used to explain this principle a while ago.
If you take the average of the opposite crown angels you will see that they average out correctly.
Example taken from the Sarin report
34.0° + 33.4° = 67.4° / 2 =33.7°
33.8° + 33.6° = 67.4° / 2 =33.7°
33.9° + 33.4° = 67.3° / 2 =33.65°
34.0° + 33.2° = 67.2° / 2 =33.6°
This is what tolerance is, gentlemen, this is the art of Diamond cutting a variance on 33.6 to 33.7, not going clock wise around the stone and comparing one to the next one or the lowest and the highest even though its only 8/10ths of a degree thinner than a hair on your head. Using this so called “tolerance”, is incorrect because it doesn’t reflect optical alignment of the opposite facets, which is crucial for optimizing the light performance of the diamond.
Again it’s the relationship of the
opposite angels. In this particular diamond it is a result of working the stone to limit the amount of light leakage.
Lesson 2:
Note the consistency of the girdle: if this stone was not cut correctly the girdle would be wavy.
This particular stone is not New Line of “A Cut Above” because of the slight amount of light leakage.
It is also important to understand that in standard configuration DiamCalc cannot simulate light leakage for the stones with even distribution of the light return based on crown and pavilion angles only. All the minor facets should be taken into account.
Hope this helps