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 » RockyTalky
»  » The 65/65 rule....
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The 65/65 rule.... |
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| P: 5/6/2003 3:26:55 PM | |
MsGolightly Rough Rock Total Posts: 8 Last Post: 5/6/2003 Member Since: 5/6/2003 |
Can somebody please explain what the 65/65 rule is?
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| Posted: 5/6/2003 3:26:55 PM | |
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There are 4 replies to this message. There are 4 replies on this page. |
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| P: 5/6/2003 4:48:51 PM | |
Hest88 Ideal Rock Total Posts: 3,670 Last Post: 11/20/2009 Member Since: 1/22/2003 |
I think I've only heard Fred Cuellar use 65/65; most use the 60/60 rule. The 60/60 rule is an outdated rule of thumb that said a diamond with a 60% table and 60% depth was ideal. It's since been proven to be wrong.
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| Posted: 5/6/2003 4:48:51 PM | |
| P: 5/6/2003 5:58:13 PM | |
Pricescope Administrator Total Posts: 8,265 Last Post: 1/5/2008 Member Since: 1/1/2000 |
I guess 65/65 is Fred's rule for fancies like Princess
Pricescope |
| Posted: 5/6/2003 5:58:13 PM | |
| P: 5/7/2003 12:01:43 AM | |
Rhino Ideal Rock Total Posts: 4,861 Last Post: 11/21/2009 Member Since: 3/29/2001 |
It is Fred's rule and has no basis in fact. It is "possible" to have a nice princess cut that is 65/65 but it is not likely as most are cut with shallow crowns with pavilions that do not compliment. His "rule" does not consider the most crucial element to brilliance and fire in diamonds and that is of the relationship between the crown/pavilion angles. I've analyzed dozens of princess cuts with seemingly GREAT table/total depth measurements only to turn up leakers. The equation that leaves out that relationship is nothing but an empty theory. It begs the question ... "WHERE'S THE BEEF?" Rhino Rhino |
| Posted: 5/7/2003 12:01:43 AM | |
| P: 5/7/2003 5:26:07 AM | |
barry Cut Rock Total Posts: 440 Last Post: 12/1/2003 Member Since: 3/22/2001 |
Painting by the "numbers" in Fancies is a one-way street, i.e; certain numbers will definitely indicate a poorly-cut, low-light output, high light-leakage diamond but not necessarily guarantee a high-octane va-va-voom stone. My research over the past two years with Princess-Cuts indicates that there are several "numbers" combinations outside of what is currently considered to be chart "ideal" that will result in a beautiful diamond. That is why I do not show Megascope data for Princesses on my website but instead display visual information in the form of the Digital Photos, BrillianceScope, and ImageScope to demonstrate light output and light leakage. Barry www.superbcert.com
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| Posted: 5/7/2003 5:26:07 AM | |
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