- Joined
- Apr 5, 2012
- Messages
- 995
Hi all
I have been searching for a fancy cut with optimum light performance for quite a while as the centre piece for a RHR. I am drawn to octagonal shapes (plus squarish cushions) and, after flirting with the idea of an asscher for some time, and then a step cut square cushion, I realised that I need more sparkle than a step cut is going to provide. After a few false starts with diamonds that have disappointed for one reason or another I have found what I think is a Princess of Hearts or square H&A radiant diamond. According to GIA it does not have a brand name lasered onto the girdle so I'm unsure if it's a branded diamond being sold on the secondary market or just a generic cut based on the H&A cut design in a square radiant cut diamond.
It measures around 6 x 6mm, and has a 57% table and 71% depth. According to the "official" criteria for radiants it's too deep, with too small a table and too thick a girdle (Sthk - Xthk) so didn't show up on any vendors websites as being a recommended great cut although I have read that these are the criteria needed to make POH style radiants perform as they do.
Here is the photo from the vendor:
Idealscope:
And ASET:
I compared the ASET to one which was posted a while ago for a POH diamond:
Clearly the cut pattern is the same but the ASET/ idealscope and photo for my stone shows less consistency to the contrast "arrows" and possibly more leakage under the table.
I am wondering if the photo and ASET images were taken with the diamond ever so slightly tilted, accounting for the lack of consistency in the arrows pattern across the diamond. I've asked the vendor to check and re-take the images with the diamond completely straight to see if they are more consistent with the last POH ASET I posted above, but this will take another couple of days. In the meantime I was hoping that anyone with experience of POH/ square H&A diamonds could weigh in. Does my diamond look like a POH? If it is a POH then is that a guarantee of excellent light performance? What do people think of my ASET/ idealscope images so far?
Can any POH/ square H&A owners tell me how their diamonds perform in real life? Is there much leakage under the table? How is the fire and white light return? Do these diamonds give a really symmetrical light return when viewed face-on? Are they overly dark because of so much contrast from the large "arrows"? What kind of settings do these work well in? Are they a great choice for fancy with great light performance? Any drawbacks?
I have been searching for a fancy cut with optimum light performance for quite a while as the centre piece for a RHR. I am drawn to octagonal shapes (plus squarish cushions) and, after flirting with the idea of an asscher for some time, and then a step cut square cushion, I realised that I need more sparkle than a step cut is going to provide. After a few false starts with diamonds that have disappointed for one reason or another I have found what I think is a Princess of Hearts or square H&A radiant diamond. According to GIA it does not have a brand name lasered onto the girdle so I'm unsure if it's a branded diamond being sold on the secondary market or just a generic cut based on the H&A cut design in a square radiant cut diamond.
It measures around 6 x 6mm, and has a 57% table and 71% depth. According to the "official" criteria for radiants it's too deep, with too small a table and too thick a girdle (Sthk - Xthk) so didn't show up on any vendors websites as being a recommended great cut although I have read that these are the criteria needed to make POH style radiants perform as they do.
Here is the photo from the vendor:
Idealscope:
And ASET:
I compared the ASET to one which was posted a while ago for a POH diamond:
Clearly the cut pattern is the same but the ASET/ idealscope and photo for my stone shows less consistency to the contrast "arrows" and possibly more leakage under the table.
I am wondering if the photo and ASET images were taken with the diamond ever so slightly tilted, accounting for the lack of consistency in the arrows pattern across the diamond. I've asked the vendor to check and re-take the images with the diamond completely straight to see if they are more consistent with the last POH ASET I posted above, but this will take another couple of days. In the meantime I was hoping that anyone with experience of POH/ square H&A diamonds could weigh in. Does my diamond look like a POH? If it is a POH then is that a guarantee of excellent light performance? What do people think of my ASET/ idealscope images so far?
Can any POH/ square H&A owners tell me how their diamonds perform in real life? Is there much leakage under the table? How is the fire and white light return? Do these diamonds give a really symmetrical light return when viewed face-on? Are they overly dark because of so much contrast from the large "arrows"? What kind of settings do these work well in? Are they a great choice for fancy with great light performance? Any drawbacks?
According to them it would have poor light performance because it was outside of their suggested parameters for a radiant. They didn't bother to consider any further information other than the table, depth and girdle thickness. They even went so far as to say that if I ordered it from them it would be non-returnable because they didn't want to be saddled with a poor performing diamond in their inventory that would be difficult to sell on!!! 
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