shape
carat
color
clarity

Question on table % and cut grade for round diamonds

ucsdswim

Rough_Rock
Joined
Mar 21, 2012
Messages
4
Hi -
I'm new to this and trying to learn as much as I can, and am looking for a round engagement ring stone with a budget of ~$3.5-4k. I want to stick with an excellent cut, but beyond that I'd like to find a good combination of color and clarity to let me stretch my budget as far I can.
I was looking at this diamond here:
http://www.jamesallen.com/diamonds/K-SI1-Good-Cut-Round-Diamond-1466596.asp
Which is about as low as I'd want to go in color and clarity, but is a large stone for my budget, and is graded as an excellent cut (according to the GIA report, although it says good cut in the web link for some reason). This stone is 1.09 carats, and has a 62% table, 60.7% depth, 34.5 degree crown angle, and 41 degree pavilion angle.
Compared to other "excellent" or "ideal" cut diamonds I've looked at, this one has a much larger table, but still seems to fall within the GIA "excellent" cut grade (it gets a 3.2 on HCA, and perhaps this table would be outside the AGS ideal cut range). I was wondering if anyone could comment on how this larger table might affect the appearance of this diamond, compared to a diamond with a table between ~55%-57% (which seems to be much more typical of excellent or ideal cut diamonds).
Beyond this cut question, is a "K" color getting too low for a platinum setting? I've read that you can get away with lower colors a little better with a gold setting, but a slight color tint might be a little more noticeable in a platinum or white gold setting. Should the medium blue fluorescence in the diamond above help with this?
Thanks in advance for any advice,
 
i wouldn't buy an RB with table % > depth %... :knockout:
 
The color is noted as faint brown, which many people find more pleasing than a yellowish tint. I do think the tint will be noticeable from the sides and, in some lighting, from the top. Setting J-K-L diamonds in platinum settings is a matter of personal preference. Some people think it makes the stone look whiter. Many jewelers I know would recommend yellow gold, but I really think it's a matter of personal preference; skin tone; whether or not there are other diamonds in the setting, etc.

I, too, would be cautious about a diamond that has a table percentage larger than its depth percentage. The stone can look white, bright, and large for its size, or it could have a darkish center and a lot of table reflection. In addition, the diamond appears to have longer lower girdle facets (i.e., "skinny" arrows) which may make the diamond look bright with a lot of white flashes but may make it look dull and less sparkly away from spotlighting. James Allen has a good return policy; you could order the stone and take a look at it in real life under many lighting conditions -- it's the only way you'll know if the color will bother you and if the so-so cut will be noticeable to you. Here's an old thread with information in it about table reflection and lower girdle facets (lgf's).
https://www.pricescope.com/communit...rdle-length-affect-face-up-performance.87181/
 
I prefer tables of 54-58 but might consider 60..no more than that or the crown is just going to be tiny.

I also think K color is going to be noticeably tinted and I would not recommend going below J color for an engagement ring unless the recipient has seen K color stones and particularly has requested one.
 
GET 3 FREE HCA RESULTS JOIN THE FORUM. ASK FOR HELP
Top