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»  » Diamond Prices and Grading »
 » RockyTalky
»  » Is There A Cut Advisor For Old Mine Cut Stones And Other Shapes?
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Is There A Cut Advisor For Old Mine Cut Stones And Other Shapes? |
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| P: 9/25/2005 1:00:54 PM | |
jewelgal Cut Rock Total Posts: 178 Last Post: 6/17/2009 Member Since: 8/6/2004 |
I love the Holloway Cut Advisor, but when I am entering old cut stones' dimensions, it always says, "the girdle is overly thick...." and I want to be able to see how the "ideal" cut recommendations for old mine cut and transitional rounds...... Thanks 
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| Posted: 9/25/2005 1:00:54 PM | |
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There are 4 replies to this message. There are 4 replies on this page. |
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| P: 9/25/2005 2:26:15 PM | |
valeria101 Ideal Rock Total Posts: 14,048 Last Post: 4/30/2006 Member Since: 8/29/2003 |
No.. HCA only works for rounds and, if you look over Garry's posts, you will find some explanation that other shapes are too intricate to make a HCA-equivalent reasonably easy to use and acurate... OEC should work though because they are so close to the round brilliant - if you can find one with the required numbers that is. I do not know if the HCA scores are tuned to make sense for proportions wildely different from the mainstream modern rounds though. There is an AGA table for the old cuts that was talked about earlier on and probably some posters have it (I do not). This is all I know... ... unless you want to make use of DiamCalc somehow. That one has a cut scoring grid as well (a bit different than HCA). You can see what the scores look like on the free Diamond Adviser viewer (the download is available from a link at GoodOldGold and elsewhere - on OctoNus website). To play around with the old mine model in there you need the full version though (preciey & otherwise useless). There is free software designed for the same function (say, GemCad) but it is not as good looking, easy going or sophisticated. IMO - not worth it unless you fnd this sort of things fun or useful. For me, they are fun enough. Ana "The greatest experts are only as good as the sum total of what they have seen." [Souren Melikian] |
| Posted: 9/25/2005 2:26:15 PM | |
| P: 9/25/2005 7:26:43 PM | |
perry Ideal Rock Total Posts: 1,782 Last Post: 11/16/2009 Member Since: 9/19/2004 |
I can only suggest that you get an experts opinon on a specific stone. I understand that Dave Atlas specializes in old mine cut diamonds. Perry
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| Posted: 9/25/2005 7:26:43 PM | |
| P: 9/26/2005 4:17:35 AM | |
Garry H (Cut Nut) Ideal Rock Total Posts: 11,577 Last Post: 11/22/2009 Member Since: 8/16/2000 |
too many variables lower girdle lengths etc and so few would score well anyway But if you have a reasonable stone the scan proportios should work unless the stone really does have a very very thick or too thin girdle. Garry Holloway FGAA DipDT |
| Posted: 9/26/2005 4:17:35 AM | |
| P: 9/26/2005 7:58:49 AM | |
oldminer Ideal Rock Total Posts: 4,964 Last Post: 11/20/2009 Member Since: 9/4/2000 |
There is a chart for old European cut round outline diamonds on my website, but it does not work for cushion, old mine cuts. You must select these cuts with your eyes, but you can use the chart on rounds as a screening tool. David S. Atlas |
| Posted: 9/26/2005 7:58:49 AM | |
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