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ť Oval Carat Size vs. Dimensions

Oval Carat Size vs. Dimensions

P: 5/9/2007 11:18:27 PM
crazyzete Rough Rock Total Posts: 5 Last Post: 5/10/2007 Member Since: 5/6/2007	I have the GIA reports for 2 diamonds in front of me, and I cannot for the life of my figure something out. Diamond 1 is a 1.26 ct with dimensions 8.54 x 6.27 x 3.43 mm Diamond 2 is a 1.25 ct with dimensions 8.85 x 6.30 x 3.61 mm The first diamond is not as deep and has a lower depth %. I would assume that if the spread on the second diamond was larger, the diamond would be shallower than the first. Can anyone explain how a 1.25 ct oval can have a length, width, and depth all larger than a 1.26 ct? Does the above make sense to anyone, or is there a possibility the the GIA report is bad (in respect to the dimensions - I can have a jeweler throw diamond #2 on a scale to check the weight).
Posted: 5/9/2007 11:18:27 PM

There are 4 replies to this message. There are 4 replies on this page.

P: 5/9/2007 11:32:08 PM
JulieN Ideal Rock Total Posts: 7,144 Last Post: 11/22/2009 Member Since: 7/25/2005	the bulges may be different. remember these are not perfect ellipses. or they may be cut differently. are both culets pointed? there is an article on oval cutting by bruce harding in the PS journal.
Posted: 5/9/2007 11:32:08 PM

P: 5/10/2007 8:57:00 AM
crazyzete Rough Rock Total Posts: 5 Last Post: 5/10/2007 Member Since: 5/6/2007	Thanks Julie, that actually makes a lot of sense. My girlfriend seemed to like both, but she's been wrapped up with getting a LW ratio that she likes. I guess this is the other factor in that - I would presume the one with smaller dimensions is probably bulging more. The larger diamond with less ct weight either has somewhat of a negative bulge, or is more in line with no bulge. But if she likes the shape to the eye, then it probably doesn't matter much. We're looking at going with the deeper one. 57.3% depth is still shy of Dave's ideal depth, but there's no bowtie, and hopefully 1.7% is not going to be that noticeable. As for cutlet, I think they both have none. I am not sure whether or not that means there is a point.
Posted: 5/10/2007 8:57:00 AM

P: 5/10/2007 11:14:56 AM
Cehrabehra Ideal Rock Total Posts: 7,597 Last Post: 11/21/2009 Member Since: 6/29/2006	I asked the same question.... http://www.pricescope.com/idealbb/view.asp?topicID=52751 and can mention the extra weight can hide in the crown as well. I ran across a cushion that had almost the same dimensions as my stone but was a half carat larger! the other stone did have a larger table and fuller corners... but it is weird to see such variety in these cuts! Sara The most beautiful experience we can have is the mysterious - the fundamental emotion which stands at the cradle of true art and true science. ~ Albert Einstein ~
Posted: 5/10/2007 11:14:56 AM

P: 5/10/2007 11:37:06 AM
crazyzete Rough Rock Total Posts: 5 Last Post: 5/10/2007 Member Since: 5/6/2007	Thanks - That link was very helpful. I'm learning the diamond shopping for a fancy (oval) is very difficult. Especially when you cannot put the two diamonds next to each other. I just wanted to know that I wasn't crazy (as my name implies) and that two diamonds could have similar weights but be off on each dimension. FYI - Both diamonds have the exact same table %, but because they are fancy shapes, GIA does not list crown/pavillion depth. Does anyone know if there is a tool like the idealscope for oval diamonds? It seems like a good concept - Put the loose diamond in a device that shows you where the light is reflecting back and where it is not, but no jeweler has suggested that such a device exists or that they have one.
Posted: 5/10/2007 11:37:06 AM

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