how bad is this comb c34.2/p41

[jin866]

Hi,
While playing with HCA, I found pavilion angle 41 seems to be a critical point.
The diamond I am seriously interested in having the following specs:
table 57%
deepth 61.1%
crown 34.2 (33.9-34.3)
pavil 41.0 (40.8-41.2)

It concerns me a bit as it has pavil 41 with HCA 1.6 (EX,VG, VG, VG)
I wonder how bad is pavilion 41? With pavil 40.8, the HCA score is much improved (EX, EX, EX, VG). I wonder how much visul difference there is between pavil 41 and pavil 40.8?

If pavil 41 fall into a gray area (might be super might not be), is there anything else I need to check (star? LGF? ) to make sure it is a super performer? Or with 41, it can never be a super performer? I am looking for a diamond that I will keep for long long time, really don''t want to regret in the future.

As I am very fixed with other 3 C s, it is really hard to find a diamond. I am exicted to find this one which meets all of my other requirements. But I am a little bugged by the pavilion angle.

Anyway, thanks so much for your input.

Nana

 

[Mara]

HCA penalizes at 41. The diamond scores much better with 40.9 or even 40.8 or 40.7 etc.

Some say they can see a difference in a 41 pav angle. I have often wondered this myself.

I try to keep my pav angle under 41. But I think my earrings have 41 pav angles. They still look really pretty.

This stone would still outshine any maul store diamond you happen to find. But if you really want to be more particular, keep looking.

It''s really about preferences, sometimes it''s fun to split hairs on PS but other times it just drives you mad.

 

[belle]

get an idealscope image...that would help determine more about this stone including what the lgf's look like.

 

[strmrdr]

Date: 10/16/2005 5:18:52 PM
Author: belle
get an idealscope image...that would help determine more about this stone including what the lgf''s look like.

I agree with belle.
41.2 can be fine with 33.9-34.4 if its under the area thats 33.9 its near perfect.
An IS image will tell the story quickly.
It should be a very bright diamond with proper minor facet cutting which the IS image would tell us.

 

[jin866]

Thanks very much for the reply, Mara, Belle, strmrdr.

They can''t provide a IS image. So I am planning to have the stone shipped to an appraiser. So what do I need to look for in an IS image? Crisp arrows and symmetrical image and no light leak under the table? Any other (LGF, star? Never really understand these, will read more)

Another question my husband just brought up. He was a little concerned with internet shopping, while it seems to be pretty safe to me as I''ve been reading for a couple of months. But he is worried about man-created diamonds etc. Just want to check, as long as the diamond comes with a certificate it should be pretty safe right? I''d assume an appraiser should be able to easily check this kind of things and verify the diamond.

Thanks,
Nana

 

[strmrdr]

Use a vendor with a solid repuatation and have an appraiser check it and its just as safe as a great local jeweler if not safer.

 

[Garry H (Cut Nut)]

Date: 10/16/2005 7:46:52 PM
Author: nana
Thanks very much for the reply, Mara, Belle, strmrdr.

They can''t provide a IS image. So I am planning to have the stone shipped to an appraiser. So what do I need to look for in an IS image? Crisp arrows and symmetrical image and no light leak under the table? Any other (LGF, star? Never really understand these, will read more)

Another question my husband just brought up. He was a little concerned with internet shopping, while it seems to be pretty safe to me as I''ve been reading for a couple of months. But he is worried about man-created diamonds etc. Just want to check, as long as the diamond comes with a certificate it should be pretty safe right? I''d assume an appraiser should be able to easily check this kind of things and verify the diamond.

Thanks,
Nana

1. ask the vendor to look with an ideal-scope if they cant manage a photo, and gve you an opinion
2. there is a refernce chart and lots of other info on www.ideal-scope.com
3. synthetic colorless diamonds cost more than colorless at present. if you can get one for the same price many of us would be happy to buy it from you - or swap it for a natural diamond of the same quality.

 

[jin866]

Thanks for all who replied me.

I received my diamond today. I look at it through an IS, the arrows are crisp & nice but very thin (looks like those Solasfera ones). I checked at the ideal-scope website and it indicates that diamond with thin stars will have good light turn but less fire & scintillation, which is in agreemeet with HCA 1.6 (EX VG VG VG)

While I checked some of H&A diamonds''s IS image, most have thicker stars then mine. But Solasfera does have very thin stars, and a few commented in GOG page as nice diamonds
http://www.goodoldgold.com/giacutgrading.htm
also have thin stars (mine is like the grade 1 example 2)

Will get an appraiser checked out the diamond. In the meanwhile, I would like to glen as much info as possible here.

So what''s your comments? Can I say the diamond with thiner stars will have more small flushes (like the grad1 ex2 commented at GOG site)? As I never seen anything with 4EX, can''t really tell what a great diamond looks like.

Any comment is appreciated.

Nana

 

[JohnQuixote]

Hi Nana.

I believe you're speaking of the lower girdle facet lengths. You can do a rough comparison here. See what you think. Longer, narrow LGF will result in high, concentrated return in strong lighting conditions. You should see great sparkle (small flashes like you describe) and performance in direct light. With very long LGF there will be a trade-off - less robust performance in soft light compared to diamonds with short LGF - but if you like the way it looks diamonds at either end of the LGF scale, or in the middle, can all be top performers.

 

[jin866]

Thanks John. Yes mine is like LGF 85%. So are you saying it will not look as good in an office light condition?

Nana

 

[JohnQuixote]

Date: 10/18/2005 4:22:09 PM
Author: nana
Thanks John. Yes mine is like LGF 85%. So are you saying it will not look as good in an office light condition?

Nana

Nana, your diamond should look fine in fluorescent lighting/diffuse light (normal office lighting). Diamonds with good angle combos can appear bright in office lights, but dispersion (fire) suffers regardless of lower girdle length. That means you may not see as many spectral colors as you do in direct light. The construction of the diamond also plays a role. If it has good patterning, or optical symmetry, you will see more elements of contrast and dispersion in diffuse light than in a diamond with poor patterning.