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ť how much do you lose w/ deep depth?

how much do you lose w/ deep depth?

P: 3/15/2008 4:33:50 PM
vslover Cut Rock Total Posts: 474 Last Post: 4/28/2009 Member Since: 11/9/2007	Just curious...in a small diamond with a 63% depth, how much size are you really losing? Any formula to figure it out?
Posted: 3/15/2008 4:33:50 PM

There are 9 replies to this message. There are 9 replies on this page.

P: 3/15/2008 5:40:02 PM
oldminer Ideal Rock Total Posts: 4,964 Last Post: 11/20/2009 Member Since: 9/4/2000	to estimate the approximate weight of a round diamond with a medium girdle thickness multiply maximum diameter x minimum diameter x depth x .0061. If you have a diamond with a 63% depth, recalculate the depth to 60% or whatever other depth you want to test and re-do the calculatin with the lower depth measure using the supplied formula. You will see how much less the same diameter diamond would weigh with the shallower depth. The extra weight of the deeper diamond is sometimes beneficial to beauty and often simply like untrimmed fat on a steak. It can be a combination of benefit and detriment, too. David S. Atlas GG(GIA), ASG, Sr. Mbr. NAJA www.datlas.com
Posted: 3/15/2008 5:40:02 PM

P: 3/15/2008 10:41:34 PM
Garry H (Cut Nut) Ideal Rock Total Posts: 11,580 Last Post: 11/23/2009 Member Since: 8/16/2000	Date: 3/15/2008 5:40:02 PM Author: oldminer to estimate the approximate weight of a round diamond with a medium girdle thickness multiply maximum diameter x minimum diameter x depth x .0061. If you have a diamond with a 63% depth, recalculate the depth to 60% or whatever other depth you want to test and re-do the calculatin with the lower depth measure using the supplied formula. You will see how much less the same diameter diamond would weigh with the shallower depth. The extra weight of the deeper diamond is sometimes beneficial to beauty and often simply like untrimmed fat on a steak. It can be a combination of benefit and detriment, too. these 2 stones are CZ eqivalents of 1ct each, one is 6.25x4.3mm and one is 6.5x4.1mm. The size difference is more because of the diference in light return near the edges Garry Holloway FGAA DipDT HCA and Ideal-scope developer http://www.ideal-scope.com and http://www.HollowayDiamonds.com.au
Posted: 3/15/2008 10:41:34 PM

P: 3/15/2008 11:23:41 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	a formula will tell you what you lose in actually spread what you lose in performance as Garry shows is a whole nuther story. Most RB on the market 63% and over are dogs but if cut right a 63% or even 65% depth round can be a smokin diamond. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 3/15/2008 11:23:41 PM

P: 3/16/2008 9:17:36 AM
Wink Ideal Rock Total Posts: 4,032 Last Post: 11/17/2009 Member Since: 5/4/2001	I have never seen a 65% deep round brilliant that was not a dog. I suppose it is possible, but I don't think it would be very common. Wink Wink Jones GG Winfield's/High Performance Diamonds
Posted: 3/16/2008 9:17:36 AM

P: 3/16/2008 10:11:35 AM
Ellen Ideal Rock Total Posts: 22,894 Last Post: 11/6/2009 Member Since: 1/13/2006	Date: 3/15/2008 11:23:41 PM Author: strmrdr a formula will tell you what you lose in actually spread what you lose in performance as Garry shows is a whole nuther story. Most RB on the market 63% and over are dogs but if cut right a 63% or even 65% depth round can be a smokin diamond. I'm assuming none of those would be GIA Ex's you're referring to. Otherwise, I hope youknowwho doesn't see this. ~~~~~~~~~~~~~~~~ "It is also important for the State to inculcate in its subjects an aversion to any 'conspiracy theory of history' for a search for 'conspiracies' means a search for motives and an attribution of responsibility for historical misdeeds." -Murray N. Rothbard, in The Anatomy of the State John Swinton [1829-1901] Chief Editorial Writer of the New York Times (Considered "the Dean of his Profession" by his peers), when asked to toast an 'Independent Press' in a gathering at the National Press Club, circa 1880 "There is no such thing in America as an independent press unless it is in the country towns. You know it, and I know it. There is not one of you who dare express an honest opinion. If you express it you know beforehand that it would never appear in print. I am paid... for keeping my honest opinions out of the paper I am connected with. Others of you are paid similar salaries for doing similar things.... The business of the New York journalist is to distort the truth, to lie outright, to pervert, to vilify, to fawn at the feet of Mammon, and sell his country and race for his daily bread, or for what is about the same thing, his salary. You know this, and I know it and what foolery to be toasting an 'independent press.' We are tools, and the vassals of rich men behind the scenes. We are jumping-jacks. They pull the strings and we dance. Our time, our talents, our lives, our possibilities, all are the property of other men. We are intellectual prostitutes."
Posted: 3/16/2008 10:11:35 AM

P: 3/16/2008 10:48:19 AM
elle_chris Ideal Rock Total Posts: 1,968 Last Post: 11/23/2009 Member Since: 2/19/2004	Speaking of depths, I was in Zales a few weeks before I purchased my stone. When I looked at their rings and asked about the measurements, they were all small for their size and the average depth there was 65. In those lights though, boy oh boy did they sparkle. I can totally see how people get taken by them if they don't know the standard size for carat weight. OH, and they had a 2ct that was way under 8mm, H, SI1, graded by IGI, for 20k. They also had a 3ct 8.50mm stone, H, I1 for 32k. I was shocked. elle
Posted: 3/16/2008 10:48:19 AM

P: 3/16/2008 12:34:12 PM
Lord Summerisle Ideal Rock Total Posts: 859 Last Post: 11/19/2009 Member Since: 12/14/2004	Date: 3/16/2008 10:11:35 AM Author: Ellen Date: 3/15/2008 11:23:41 PM Author: strmrdr a formula will tell you what you lose in actually spread what you lose in performance as Garry shows is a whole nuther story. Most RB on the market 63% and over are dogs but if cut right a 63% or even 65% depth round can be a smokin diamond. I'm assuming none of those would be GIA Ex's you're referring to. Otherwise, I hope youknowwho doesn't see this. and que another 15 page thread... _____________________ I Post Therefore I Am I am no Expert (I'm not a drip under pressure ;) ) Seek Someone who is for better info
Posted: 3/16/2008 12:34:12 PM

P: 3/16/2008 1:51:15 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 3/16/2008 9:17:36 AM Author: Wink I have never seen a 65% deep round brilliant that was not a dog. I suppose it is possible, but I don't think it would be very common. Wink Who said anything bout rounds being limited too RB's :} That said the deepest RB iv seen that was smoking was 64.7 and it was almost all in the crown. rare bird indeed. It was likely cut from a cap and a large inclusion had too be cut out. 64.7 AGS1 potential. 36/40.6/52T/80lgf/2.6 girdle. 64.7 depth. edit: I don't know if this is the exact combo I saw all the data it had was table 52 depth 64.7 but it did have nice arrows and was sparky. .57ct G or H vs clarity... I didn't pay that much attention too it other than cut. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 3/16/2008 1:51:15 PM

P: 3/16/2008 2:00:52 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	btw it is no surprise too me that Wink has never seen a nice looking RB in that depth range. I'm betting several vendors will tell you the same. They are rare birds and the Jeweler that was selling it was clear it was out of the range he normally looks at but when he was on a buying trip someone showed it too him and it was unusual so he bought it. edit: I did play with it in several lighting conditions other than the lights over the counter. Be carefull too do that if you come accross one like it :} ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 3/16/2008 2:00:52 PM

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