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Brilliancescope and ACA diamond

P: 1/27/2007 11:14:31 AM
pinktiger Rough Rock Total Posts: 3 Last Post: 1/27/2007 Member Since: 1/27/2007	I have been looking around this website and whiteflash for a while now, and heard a lot of great things about ACA diamond, and thinking about buying one from WF as a Vday gift. However, they don't provide Brilliance scope result for their ACA diamonds, and even when I called and asked for one, they said no I am just curious, how's ACA diamond performing on Brilliance scope? Can any people have done BS on their ACA diamonds share the result with me? I know BS result doesn't means 100%, but it at least give me 80% in the right direction. Thanks
Posted: 1/27/2007 11:14:31 AM

There are 97 replies to this message. There are 30 replies on this page.

P: 1/27/2007 11:24:29 AM
kenny Ideal Rock Total Posts: 2,813 Last Post: 11/22/2009 Member Since: 4/30/2005	Interesting topic. Even here on PS the vendors don't agree about this or that tool. Good Old Gold likes the BrilliantScope, Whiteflash doesn't. Do a search for it here, there are lots of strong opinions. There are even allegations that diamond cuts are specifically designed to perform well on one of the tools, which of course that vendor will use. That said, I have a WF ACA and it is superb! I don't need the BrilliantScope to tell me that. I also have a Solasfera that maxes out all three BrilliantScope parameters. Sure, I like the fact that it did that, but I'm not sure how much it matters. You can pick a superb diamond without that one tool.
Posted: 1/27/2007 11:24:29 AM

P: 1/27/2007 11:25:18 AM
Ellen Ideal Rock Total Posts: 22,894 Last Post: 11/6/2009 Member Since: 1/13/2006	Hi! IMO you don't need one with an ACA, they give you an IS and Aset image, that's enough. I own a very well cut non ACA and a pair of ACA studs, they're both stunning. No worries. ~~~~~~~~~~~~~~~~ "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: 1/27/2007 11:25:18 AM

P: 1/27/2007 11:55:22 AM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	3 options... 1: buy from someone who provides b-scope scores. 2: have the stone sent to RockDoc for an appraisal and have him run it. 3: get one with lower girdles over 77% and it will do well enough on the b-scope not to worry about running it. b-scope dont care for short lower girdles in the 75-76 range which gives some people fits. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 11:55:22 AM

P: 1/27/2007 12:13:23 PM
belle Ideal Rock Total Posts: 10,287 Last Post: 4/3/2008 Member Since: 11/19/2004	kenny, i don't think there are 'allegations' i would think that if you have a device that rates diamonds and you sell diamonds, that you will intentionally pick stones that will score well on it. that does not mean that diamonds that don't score well on it aren't beautiful, it just means they don't fit the metric that the machine was designed for. for example, if i design a machine that grades chocolate you're probably going to notice that dark chocolate doesn't score as well because to me, milk chocolate tastes better. since i designed the machine according to my tastes, the preference is going to be towards that. milk chocolate vendors will absolutely LOVE my new device because, man...milk chocolate looks like the best stuff ever! triple vh on the milk chocolate! dark chocolate lovers don't need my machine to tell them it's good or even better than milk chocolate aca lovers don't need brilliancescope (.¸(`.¸¸.´)¸.) ¨`.¸ belle¸. ´¨ (¸.(¸.´ `.¸).¸)
Posted: 1/27/2007 12:13:23 PM

P: 1/27/2007 12:16:22 PM
Ellen Ideal Rock Total Posts: 22,894 Last Post: 11/6/2009 Member Since: 1/13/2006	Date: 1/27/2007 11:55:22 AM Author: strmrdr 3 options... 1: buy from someone who provides b-scope scores. 2: have the stone sent to RockDoc for an appraisal and have him run it. 3: get one with lower girdles over 77% and it will do well enough on the b-scope not to worry about running it. b-scope dont care for short lower girdles in the 75-76 range which gives some people fits. Not all. I looked mine up, 75.7. 3 VH's. ~~~~~~~~~~~~~~~~ "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: 1/27/2007 12:16:22 PM

P: 1/27/2007 12:17:30 PM
Ellen Ideal Rock Total Posts: 22,894 Last Post: 11/6/2009 Member Since: 1/13/2006	Date: 1/27/2007 12:13:23 PM Author: belle aca lovers don't need brilliancescope Agreed. ~~~~~~~~~~~~~~~~ "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: 1/27/2007 12:17:30 PM

P: 1/27/2007 12:20:33 PM
Skippy123 Ideal Rock Total Posts: 19,822 Last Post: 11/22/2009 Member Since: 11/24/2006	Belle, Perfect analogy!!! Thanks! Skippy "The only things that stand between a person and what they want in life are the will to try it, and the faith to believe it's possible" Rich Devos
Posted: 1/27/2007 12:20:33 PM

P: 1/27/2007 12:21:49 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	There is a perfectly logical explanation why the design of the b-scope favors certain stones. Its no conspiracy to favor any one brand either. Anyone care to take a shot at what it is? edit: it has nothing to do with milk or chocolate. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 12:21:49 PM

P: 1/27/2007 12:24:02 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 1/27/2007 12:16:22 PM Author: Ellen Date: 1/27/2007 11:55:22 AM Author: strmrdr 3 options... 1: buy from someone who provides b-scope scores. 2: have the stone sent to RockDoc for an appraisal and have him run it. 3: get one with lower girdles over 77% and it will do well enough on the b-scope not to worry about running it. b-scope dont care for short lower girdles in the 75-76 range which gives some people fits. Not all. I looked mine up, 75.7. 3 VH's. there are exceptions but in general it dont like em. What are the crown and pavilion angles? ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 12:24:02 PM

P: 1/27/2007 12:34:02 PM
RockDoc Ideal Rock Total Posts: 2,509 Last Post: 6/17/2007 Member Since: 8/16/2000	Hey Storm.... I think the latest version of the B Scope software is a little more forgiving in this area, than in the past. But generally each version gets a little "tighter" yet also is written to correct or adjust areas where its dealers have voiced critical comment. Of all the equipment manufacturers...... Gemex's tech support and constant improvement and updating is the best. Gemex does constantly update and improve the software we have. Gemex does listen and respond to its dealer network comments. Two to four updates per year on average. Over the past year or so, the software is much better now. Last year they upraded all the internal cameras in the machines. Rockdoc Bill Leiberum 1948-2007 Thanks for everything and Rest In Peace,Bill.
Posted: 1/27/2007 12:34:02 PM

P: 1/27/2007 12:37:09 PM
Ellen Ideal Rock Total Posts: 22,894 Last Post: 11/6/2009 Member Since: 1/13/2006	Date: 1/27/2007 12:24:02 PM Author: strmrdr there are exceptions but in general it dont like em. What are the crown and pavilion angles? 34.05/41 ~~~~~~~~~~~~~~~~ "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: 1/27/2007 12:37:09 PM

P: 1/27/2007 12:37:16 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	That could be RockDoc. Would be interesting to see how they did that without throwing the other scores off because it is a fundamental design issue. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 12:37:16 PM

P: 1/27/2007 12:41:44 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 1/27/2007 12:37:09 PM Author: Ellen Date: 1/27/2007 12:24:02 PM Author: strmrdr there are exceptions but in general it dont like em. What are the crown and pavilion angles? 34.05/41 thought so... When someone attempts to answer my above question or this evening if my arms up too it I will tell you why and explain it. Might be tomorrow before I get too it because its going to take a lot of typing and some photoshop. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 12:41:44 PM

P: 1/27/2007 12:48:52 PM
Ellen Ideal Rock Total Posts: 22,894 Last Post: 11/6/2009 Member Since: 1/13/2006	OK, curious to hear what you think... ~~~~~~~~~~~~~~~~ "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: 1/27/2007 12:48:52 PM

P: 1/27/2007 1:01:01 PM
RockDoc Ideal Rock Total Posts: 2,509 Last Post: 6/17/2007 Member Since: 8/16/2000	Date: 1/27/2007 12:37:16 PM Author: strmrdr That could be RockDoc. Would be interesting to see how they did that without throwing the other scores off because it is a fundamental design issue. Their software people evidently figured out a way. Being a "compu-grape", it is beyond me with all the mathematical formulas for software, but I know in many ACA's the results are more accurate than they were previously. Maybe it's the software, the new camera or both? I do use the B Scope Viewer which lets my eyes do the analysis, and over time I've developed the ability to even accurately predict the result from the analyzer. It is absolutely wonderful at separating the "best" from the "very best". However, I guess the training and experience of the operator's eyes play a huge part in this when looking at stones that appear so close in light return performance. This week I had two stone submitted - one which had a B Scope and one that didn't. The one with the B Scope was a "tad" better than the one that didn't have the report. But they were very close. However, even then I could tell in the viewer that one had a slight "edge" over the other. When I did do the B Scope scan on the one that didn't have it, the results turned out as I saw with my eyes. The other stone while still in the 3 VH range, was a tad lower than the other on the analyzer result. So whatever they've done ..... it works... and works better than with older versions of the software and the older camera in it. Rockdoc Bill Leiberum 1948-2007 Thanks for everything and Rest In Peace,Bill.
Posted: 1/27/2007 1:01:01 PM

P: 1/27/2007 5:41:42 PM
pinktiger Rough Rock Total Posts: 3 Last Post: 1/27/2007 Member Since: 1/27/2007	Hi strmrdr, Thanks a lot for the information.. I am new to the terms. where can I find the data of the lower girdles %? On AGS report?
Posted: 1/27/2007 5:41:42 PM

P: 1/27/2007 5:48:44 PM
JulieN Ideal Rock Total Posts: 7,144 Last Post: 11/22/2009 Member Since: 7/25/2005	yeah, it's that number in the 70s and 80s on the pavilion.
Posted: 1/27/2007 5:48:44 PM

P: 1/27/2007 6:19:51 PM
diamondseeker2006 Ideal Rock Total Posts: 17,609 Last Post: 11/18/2009 Member Since: 1/11/2006	Pinktiger, seriously, we have a tendency on here to overanalyze sometimes, but I wouldn't get too wrapped up in lower girdle facet numbers! ACA's are going to be beautiful diamonds. The standards are high so there aren't any duds in the ACA category. Like Ellen, I also have a diamond with a Brillancescope report and I have two ACA's. They all have about the same measurements and are beautiful stones. I didn't need the Brillancescope to feel secure about the ACA's because the lower performing stones just don't make it into the ACA category. So choosing an ACA really requires little effort once you know your budget and have an idea of the color and clarity you like. ~~~ When in doubt...don't.~~~
Posted: 1/27/2007 6:19:51 PM

P: 1/27/2007 6:21:06 PM
pinktiger Rough Rock Total Posts: 3 Last Post: 1/27/2007 Member Since: 1/27/2007	So, my impression is that, BS favors some brands like Solasfera, and in general doesn't favor the ACA. If someone who can provide a list of brand that are favored or not favored by BS, it would be very interesting, or it is too politically incorrect to ask? I figure that ACA cutting should be very consistent among all ACA stones (which is one of reasons I wanna purchase a branded stone like ACA), if one did or didn't do well on BS, others might have the same consitent result, am I right? That's why I am curious if someone already had their ACA rated on BS and can share with us. Also, what is the price difference btw a Solasfera and a ACA branded stone, given that everything is similiar? I noticed on GOG, there is no price listed for their Solasfera stones.
Posted: 1/27/2007 6:21:06 PM

P: 1/27/2007 6:38:12 PM
diamondseeker2006 Ideal Rock Total Posts: 17,609 Last Post: 11/18/2009 Member Since: 1/11/2006	Good Old Gold has hearts and arrows stones that would be eqiuvalent to ACA. Solasfera is a different cut. It is not that ACA's won't score well on a brillancescope. I would think most of them would. I mean, they are graded AGS0 for light performance, so to me, I don't need further confirmation than that. ~~~ When in doubt...don't.~~~
Posted: 1/27/2007 6:38:12 PM

P: 1/27/2007 7:47:28 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	my arm isnt up to doing tonight but I will give my opinion on the question about which stones the B-scope favors and why. I think it will answer some questions. This is it for tonight..... The longer lgf% ACA's score very well on the b-scope in general. 2 vh to 3vh. vh/vh/vh vh/vh/h the scint reading isn't worth even considering so both readings are equal. The shorter lgf% ones will tend to score h/vh/h with the older setup and may have been moved up a bit in the new setup. Its not just the ACA any stone with those crown/pavilion/lgf will take a similar hit. Does it mean anyting... thats for you to decide. I will also explain in my opinion why the Solasfera maxes out the b-scope and why its useless on asschers. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 7:47:28 PM

P: 1/27/2007 7:49:19 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 1/27/2007 6:38:12 PM Author: diamondseeker2006 Good Old Gold has hearts and arrows stones that would be eqiuvalent to ACA. Solasfera is a different cut. It is not that ACA's won't score well on a brillancescope. I would think most of them would. I mean, they are graded AGS0 for light performance, so to me, I don't need further confirmation than that. AGS0 does not directly correlate to b-scope readings. But I will agree the b-sope isn't a requirement. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 7:49:19 PM

P: 1/27/2007 7:53:49 PM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 1/27/2007 6:21:06 PM Author: pinktiger So, my impression is that, BS favors some brands like Solasfera, and in general doesn't favor the ACA. If someone who can provide a list of brand that are favored or not favored by BS, it would be very interesting, or it is too politically incorrect to ask? I figure that ACA cutting should be very consistent among all ACA stones (which is one of reasons I wanna purchase a branded stone like ACA), if one did or didn't do well on BS, others might have the same consitent result, am I right? That's why I am curious if someone already had their ACA rated on BS and can share with us. Also, what is the price difference btw a Solasfera and a ACA branded stone, given that everything is similiar? I noticed on GOG, there is no price listed for their Solasfera stones. Solasfera is a totally different cut than an ACA. ACA are round brilliant cuts with 8 fold symmetry == 8 arrows/8 hearts The Solasfera is 10 fold symmetry == 10 arrows/10 hearts They have totally different personalities and performance. There are actualy 3 types of ACA's: new line, classic and in between cuts. The first is painted, second isnt, 3rd is lightly painted. Within each class are varies lgf% that provides a slightly different personality. What do you consider as being consistent? ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/27/2007 7:53:49 PM

P: 1/27/2007 9:16:47 PM
Shay37 Ideal Rock Total Posts: 3,343 Last Post: 8/30/2008 Member Since: 3/2/2004	Date: 1/27/2007 6:21:06 PM Author: pinktiger So, my impression is that, BS favors some brands like Solasfera, and in general doesn't favor the ACA. If someone who can provide a list of brand that are favored or not favored by BS, it would be very interesting, or it is too politically incorrect to ask? I figure that ACA cutting should be very consistent among all ACA stones (which is one of reasons I wanna purchase a branded stone like ACA), if one did or didn't do well on BS, others might have the same consitent result, am I right? That's why I am curious if someone already had their ACA rated on BS and can share with us. Also, what is the price difference btw a Solasfera and a ACA branded stone, given that everything is similiar? I noticed on GOG, there is no price listed for their Solasfera stones. No, I don't. However, I have an SC .76ct I, VS1 that is triple VH on the B-scope. Very balanced (by the light views) and gorgeous. I have had the opportunity to study (intensely) side by side with it in all lighting environments you can think of a .74 ct F, SI1 (eyeclean) ACA newline with shorter lgf than the SC and crown only painting. My DH could not see a dif between the two. The only thing that he and everyone else agreed on was that they did not believe that the ACA was not the bigger stone. It did not weigh more and it's mm was smaller and yet it looked bigger, and everyone could see that at a glance. I could, but it was slight nuances in the way they performed. My ACA had bigger bolder flashes of color when the lighting was good for seeing dispersion. My SC has great dispersion but it's smaller flashes more frequently. HTH shay Edited to add: so even though my ACA was not B-scoped, my SC was and the ACA was every bit as stellar a stone and then some. ______________________________My therapist loves me. His name is Brian the Cutter.
Posted: 1/27/2007 9:16:47 PM

P: 1/27/2007 11:49:11 PM
avlis Cut Rock Total Posts: 237 Last Post: 8/20/2008 Member Since: 10/22/2006	it seems to me, from reading these boards over the last half year, that the Whiteflash people (JohnQ) and the GoG people(Rhino) have slightly differnet opinions on what an ideal cut diamond should be cut to. whiteflash seem to like thier stones a little more shallow than GoG, OR GoG seems to like thier stones a little more deep than WF. as far as i can tell they both offer beautiful stones, although i should mention i purchased a GoG stone. the stone i purchased has great broad flash fire, whitelight return, and overall great ambiant light return. too bad i only get to see it at night when the fiance comes over. it was a 2xVH on the BS and 1 split VH/H on scintillation. it is the most beuatiful diamond i have seen outside of tiffany's. i suspect that is because of thier light engineering.
Posted: 1/27/2007 11:49:11 PM

P: 1/28/2007 9:58:22 AM
loudway Rough Rock Total Posts: 16 Last Post: 1/29/2007 Member Since: 1/23/2007	Hi strmrdr , could you or someone tell me what's the LGF % is on this stone? http://www.whiteflash.com/hearts_arrows/A-Cut-Above-H-A-cut-diamond-179762.htm#. It seems only have 75%, correct? I thought most ACA should have lgf iover 76%? Thanks a lot in advance.
Posted: 1/28/2007 9:58:22 AM

P: 1/28/2007 10:25:36 AM
starryeyed Ideal Rock Total Posts: 1,587 Last Post: 10/5/2009 Member Since: 11/6/2006	Date: 1/28/2007 9:58:22 AM Author: loudway could you or someone tell me what's the LGF % is on this stone? http://www.whiteflash.com/hearts_arrows/A-Cut-Above-H-A-cut-diamond-179762.htm#. It seems only have 75%, correct? I thought most ACA should have lgf iover 76%? Thanks a lot in advance. Hi Loudway. John Pollard from WF did a Webinar yesterday and talked about LGF's. He also posted some info on this THREAD. From some of the comments on this thread and others, I was under the impression that 75% is a very short LGF, This couldn't be further from the truth. The GIA LGF range for Excellent cut candidates is 67.5% to 87.5%. The midpoint is 77.5%. If I recall from the webinar, ACA's are around 75-80%, plus or minus. I believe the stone you referenced has an LGF of 74.4%. One thing should be made clear - this LGF is FINE. The stone is ideal and certainly beautiful. LGF's are a matter of personal taste.
Posted: 1/28/2007 10:25:36 AM

P: 1/28/2007 10:32:03 AM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 1/28/2007 9:58:22 AM Author: loudway Hi strmrdr , could you or someone tell me what's the LGF % is on this stone? http://www.whiteflash.com/hearts_arrows/A-Cut-Above-H-A-cut-diamond-179762.htm#. It seems only have 75%, correct? I thought most ACA should have lgf iover 76%? Thanks a lot in advance. ACA's range from around 75 to 80.... 75 is short but extremely short or very short .. nah... too short in my opinion... yep.. but some people like em. And others its an ACA so it can do no wrong. Where I could care less where the diamond came from and each is evaluated on its merits. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/28/2007 10:32:03 AM

P: 1/28/2007 10:33:57 AM
loudway Rough Rock Total Posts: 16 Last Post: 1/29/2007 Member Since: 1/23/2007	so what is the negative side of the "too short"? can't be sparkling enught?
Posted: 1/28/2007 10:33:57 AM

P: 1/28/2007 10:45:08 AM
strmrdr Ideal Rock Total Posts: 23,296 Last Post: 10/9/2009 Member Since: 11/1/2003	Date: 1/28/2007 10:33:57 AM Author: loudway so what is the negative side of the 'too short'? can't be sparkling enught? from the other thread... Forgetting that these are oversize because its the ratio that's important not the exact size that matters. The shorter LGF% diamond have more dark area than the longer lgf% diamonds and under the table is where it is most visible. With greater head shadow this is even more apparent. Therefore the longer lgf% diamonds until you get too long(starting at 85% and apparent at 90% below) then it reverses a little have a better light to dark ratio that is visible at any size. ........... Karl has joined the diamond trade and is now posting as Karl_K
Posted: 1/28/2007 10:45:08 AM

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