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Do you prefer 75% or 80% Lower Half Facet Length?

S

SweetJimmy

Rough_Rock
Joined
Jan 28, 2013
Messages
15
All else being equal, so assume GIA ExExEx, AGS OOO, HCA <2, do you prefer a stone with 75% LF or 80% LF?

I'm stuck deciding between the two. I understand that this can be a matter of personal taste and preference. And I understand that the GIA reports have a rounding variance as well. Just curious what the masses and pros think.

Thanks,

SJ
 
Re: Do you prefer 75% or 80% Lower Girdle Facet

75% (up to 77%), can't stand the splintery ones myself, but that's just a personal preference.

here's a video on LGF lengths:

http://vimeo.com/album/44212/video/4095697
 
Re: Do you prefer 75% or 80% Lower Girdle Facet

75% - 77% for me, apparently. My first H&A had 80% an there was always "something" about that stone that I didn't like. So I upgraded and the new one is 77% and I like its arrows better. I like fat arrows.
 
Thanks for posting that link, bastet. While I'm not an RB girl, it's still a super useful video. It's good for understanding cut, in general.
 
I second the thanks as well. Very informative in regards to the effect on sparkle/scintillation that LGF lengths have. Interesting to hear that 75-77% stands out as the preference currently. I can understand this as the arrows would be more pronounced in theory. And if you buy a H&A diamond, seeing those arrows would be a cool thing.

While you get more sparkle at 80%. The difference does appear negligible except to perhaps the most discerning eye.
 
It depends on the rest of the proportions.

PS also goes through phases/trends. Unfortunately, LGF 76 will get rounded to 75 and 78 will get rounded to 80 by GIA, when there is not really that much difference between the two.
 
you're welcome! :wavey:
 
JulieN|1359661210|3368772 said:
It depends on the rest of the proportions.

PS also goes through phases/trends. Unfortunately, LGF 76 will get rounded to 75 and 78 will get rounded to 80 by GIA, when there is not really that much difference between the two.
Click to expand...

LOL. Of all the things to boast as trendy... your stone's LGF length :bigsmile: You're right though, short is "in" right now!
 
I like fat arrows. :)
 
Re: Do you prefer 75% or 80% Lower Girdle Facet

bastetcat|1359658541|3368710 said:
75% (up to 77%), can't stand the splintery ones myself, but that's just a personal preference.

here's a video on LGF lengths:

http://vimeo.com/album/44212/video/4095697
Click to expand...

Me too, I prefer fatter arrows.
 
Unless you are getting a really large diamond, I don't think 75-80 really matters. The contrast is with the August Vintage Rounds which have much fatter LGF's than the 75-80. I really, really wouldn't get too caught up in that. I have never seen a diamond choice boil down to that particular factor. There is almost always something else that will sway me to one stone over another. I don't know if you have posted your two possibilities, but I'll bet we might be able to tell you other reasons to take one over another.
 
I would pause the theoretical speculation and wait until your vendor has both stones in hand.

FIC with fat arrows is not going to be as bright as more typical Tolk combos.
 
JulieN|1359667222|3368909 said:
I would pause the theoretical speculation and wait until your vendor has both stones in hand.

FIC with fat arrows is not going to be as bright as more typical Tolk combos.
Click to expand...
Yes FIC's work better with longer lgf% but with a 40.6 pavilion if the actual angles are close then it isn't that big a deal if one likes the look.
More contrasty then a tolk would be a better term than less bright.

As far as 75% vs 80% it depends on the combo. 56t/34.5/40.7/76LGF% would have about the same visual arrows as a 56t/34/41/80Lgf%. 77-78 works with the widest range of combos.
 
Karl, any chance of a DC?

1.14 ct

6.64x6.67x4.15

GIA: 62.4D/56T/36.0CA/40.6PA/55%/75%

stone_image.jpg
 
JulieN|1359668703|3368943 said:
Karl, any chance of a DC?

1.14 ct

6.64x6.67x4.15

GIA: 62.4D/56T/36.0CA/40.6PA/55%/75%
Click to expand...
GIA numbers grumble grumble... to rounded for DC.
Looking at the pic the lgf is likely right around 75 and the c/p work with each other.
This is one of those stones that cant be dismissed out of hand unless one is looking for H&A.
On the other hand it is impossible to say the person will or wont like it compared to near tolk or longer lgf FIC.
Overall a less sure option than some when buying online.
A good return policy would be a must.
 
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