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 » RockyTalky
»  » Are hearts & arrow cuts always ideals?
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Are hearts & arrow cuts always ideals? |
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| P: 2/25/2005 3:11:42 PM | |
IslandDreams Ideal Rock Total Posts: 2,011 Last Post: 12/3/2008 Member Since: 11/19/2004 |
If a diamond is a hearts & arrow cut diamond is it also then always an ideal cut or are there hearts & arrow patterned diamonds but with mediocre cuts?
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| Posted: 2/25/2005 3:11:42 PM | |
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There are 7 replies to this message. There are 7 replies on this page. |
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| P: 2/25/2005 3:33:27 PM | |
Regular Guy Ideal Rock Total Posts: 5,326 Last Post: 11/24/2009 Member Since: 7/7/2004 |
I could be wrong...but if the idea of "ideal" is pretty highly correlated with (maybe identical with?) efficient light performance...I believe recently Garry reported a good number of leakers. Maybe he or others will help review this in more detail. Ira (Ruffles have Ridges) Z. |
| Posted: 2/25/2005 3:33:27 PM | |
| P: 2/25/2005 3:36:35 PM | |
Wink Ideal Rock Total Posts: 4,037 Last Post: 11/24/2009 Member Since: 5/4/2001 |
We actually discussed this just the other day in this thread: http://www.pricescope.com/idealbb/view.asp?topicID=25424 We started out on the fact that not all AGS 0 cuts were Hearts and Arrows. To answer your question more directly, I once had a perfect hearts and arrows picture in a stone (working from memory here, I may be off a notch, but not much) that had a 61 table and I believe a 62 or 3 depth. It was not even CLOSE to an ideal. I think I got it on my second trip to Antwerp many years ago, it did not last long, it was a beauty. Wink Wink Jones |
| Posted: 2/25/2005 3:36:35 PM | |
| P: 2/25/2005 4:53:40 PM | |
Lord Summerisle Ideal Rock Total Posts: 859 Last Post: 11/19/2009 Member Since: 12/14/2004 |
I think you've got to remember h&a patterning is a seperate item to proportions in some respect. Ideal cuts refer to the proportions being within a set range... hence the square shown in the HCA graph - showing the 4 extremes in proportions for an ideal grade. (based around the mesurments of Towhowever-you-pronounce-it) the H&A pattern if formed thought reflections of light internally. this is seperate to the proportions... it could be cut way outside the ideal proportions - but be well cut so as to reflect the light correctly so as to display the patterning. thats is... you can have a beautiful cut graded 0 by AGS that doesnt show a perfect hearts pattern... (say a lower girdle facet has been polished in a way which has Yawed the facet so as to cheat and get a Ex symetry grade (ie meet point)- but it screws the hearts as one half of a heart will be off) you can have a diamond cut so as to have perfect internal symetry - but have crap proportions (say 33° crown and 42° pav) or you can have both ideal proportions and perfect internal symetry and you end up with an ideal cut H&A. Most of those we tend to talk about on here come from companies who trade on ideal cuts... which display H&A and recut those that fall outside that range or shops which select from inventories those which tick both ideal and H&A boxes and reject those poor performers. which is how we consumers can make the mistake of believing that it being H&A and therefore ideal - its just we have it quite good round here  of course this could all be hookum.. and im talking rot. seek someone who knows. :) _____________________ |
| Posted: 2/25/2005 4:53:40 PM | |
| P: 2/26/2005 1:01:10 PM | |
Garry H (Cut Nut) Ideal Rock Total Posts: 11,583 Last Post: 11/24/2009 Member Since: 8/16/2000 |
Yes Wink - there are plenty of really nice looking H&A's patterns that can be right dogs. This model has perfect Sir John patterns and 58% table / 61.9% depth.  Garry Holloway FGAA DipDT |
| Posted: 2/26/2005 1:01:10 PM | |
| P: 2/26/2005 1:52:23 PM | |
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Wink Ideal Rock Total Posts: 4,037 Last Post: 11/24/2009 Member Since: 5/4/2001 |
Hey Gary, Does that stone have as little contrast as shown in the picture? Is it then a fairly lifeless stone, or is it pretty? Wink Wink Jones |
| Posted: 2/26/2005 1:52:23 PM | |
| P: 2/26/2005 9:52:59 PM | |
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Garry H (Cut Nut) Ideal Rock Total Posts: 11,583 Last Post: 11/24/2009 Member Since: 8/16/2000 |
It is a Daimcalc model 41 pavilion 35.5Crown and 58% table Wink. And yes if you had one in your hand it would not impress you. The Firescope would show the stone as having better dark stars than the ideal-scope because the lens hole is larger. Garry Holloway FGAA DipDT |
| Posted: 2/26/2005 9:52:59 PM | |
| P: 2/26/2005 11:21:30 PM | |
JohnQuixote Ideal Rock Total Posts: 5,212 Last Post: 5/24/2008 Member Since: 9/9/2004 |
Date: 2/26/2005 1  1:10 PMAuthor: Garry H (Cut Nut) Yes Wink - there are plenty of really nice looking H&A's patterns that can be right dogs. This model has perfect Sir John patterns and 58% table / 61.9% depth. Sir John patterns. You mean like waking up, putting coffee on, feeding the cats then checking email...? John |
| Posted: 2/26/2005 11:21:30 PM | |
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