They probably look more yellow too because the stones in the jewelry stores you compare them to aren't cut very well and therefore show more color.Date: 2/17/2007 10:03:46 PM
One of my favorite things to do is visit jewelry stores and look at their diamonds. My wife has a D and an H that she wears all the time and I use them as a refernece when I'm out looking. I know my wife's stones are properly graded because they were graded by GIA and checked by and independent appraiser. Many of the stones I see in stores are misgraded. There is a fair amount of documentation that indicates that mounting a stone will make it look possibly one color grade higher than when unmounted. In my observations (I am as novice as you could find) I can't tell the difference between a properly graded G and my wife's mounted H when I hold them next to each other. However roughly half of what I look at graded H in B&M stores looks noticably yellow next to my wife's H. My conclusion is that unless the stone is GIA H there is probably a chance that it is actually two levels lower than stated. This could just be in my area of the country but GIA is the rule for me. I can see the differnece between D and H very easily especially with a reference stone. To my eyes a two grade difference in any direction is noticable but to my wife everything above I looks the same. I would say that unless they are next to each other in a setting, a properly cut and graded G and H would be very hard to differenciate. The problem is that there doesn't seem to be consistent grading in uncertified stones. Two cents from a total amature.....
DS is right... from everything I''ve seen including some studies done (one is listed in the knowledge section of ps) that while what you''re saying might be true for CUT it isn''t true for color. GIA is stricter for color. For cut you can go either way as long as YOU know the numbers you want but yes, AGS is often preferred for cut.Date: 2/18/2007 12:17:12 AM
I tend to like AGS0 gradings better than GIA. I feel they''re more strict and the data is better.