shape
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Can you comment on these two stones?

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ohboiya

Rough_Rock
Joined
Feb 24, 2007
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13
Hello all,

I''m torn between two stones and don''t know what to make of the specifications. Would you kindly offer your comments and which you would prefer? Price is about the same. The gradings are both from Tiffany but #1 is based on their new grading system / methodology

Stone #1 round brilliant
carat - 1.64
colour - E
measurements - 7.55 - 7.61 x 4.68mm
fluorescence - none

precision - excellent
symmetry - excellent
polish - excellent

clarity - vs2

total depth % - 61.7
table size % - 57
crown height - 15.2
crown angle - 34.8 degrees
star length % - 50
pavilion depth % - 43.3
pavilion angle - 40.9 degrees
lower half length % - 80
girdle thickness - medium
girdle finish - faceted
culet - none


Stone #2 round brilliant
carat - 1.72
colour - F
measurements - 7.67 - 7.89 x 4.71mm
fluorescence - none

precision - excellent
symmetry - very good
polish - excellent

clarity - vs2



total depth % - 60.6
table size % - 55
crown angle - 34.3 degrees
pavilion depth % - 42.3
girdle thickness - medium
girdle finish - faceted
culet - none

All comments very much appreciated!!!
 

kcoursolle

Super_Ideal_Rock
Joined
Jan 21, 2006
Messages
10,589
do you have the pavillion angle on the second stone? Angles are more accurate than percentages. So far both stones look fine.
 

aljdewey

Ideal_Rock
Joined
Nov 25, 2002
Messages
9,170
Both look fine; I''d likely select the second one because the depth will let it maximize the spread.
 

ohboiya

Rough_Rock
Joined
Feb 24, 2007
Messages
13
So would you both agree that given the price is the same for both stones, I should go for the bigger one?

thanks!
 

Kaleigh

Super_Ideal_Rock
Joined
Nov 18, 2004
Messages
29,570
I also like the second one. And it''s bigger, so yeah.
 

kcoursolle

Super_Ideal_Rock
Joined
Jan 21, 2006
Messages
10,589
Date: 3/22/2007 8:28:35 PM
Author: ohboiya
So would you both agree that given the price is the same for both stones, I should go for the bigger one?

thanks!
yeah, I''d go for the second one because I like the depth percentage more. Don''t worry about the F color, it will still be icey white.
 

ohboiya

Rough_Rock
Joined
Feb 24, 2007
Messages
13
gawd ... i''m loving the consistency of your comments!!! it''s being shipped from london tomorrow and i should be able to view it on Monday!!!!!!!!!!!!!
 

JulieN

Super_Ideal_Rock
Premium
Joined
Jul 25, 2005
Messages
13,368
7.89 / 7.67 = 1.028

2nd stone is out of round
 

JulieN

Super_Ideal_Rock
Premium
Joined
Jul 25, 2005
Messages
13,368
technically, a stone is out-of-round when the large diameter/small diameter>1%

Some stones get Excellent or Ideal symmetry, even though there is more than 1% deviation. Labs can make there own call, and if they say it's Excellent or Ideal symmetry (no off-roundness noticeable to the eye) then that is cool with me.

I am only pointing out that there is a 3% deviation, which may explain why stone 2 has "very good" symmetry (which may be visible) which may impact performance. But you will get to call that yourself.

Any ideas what Tiffany means by "precision?"
 

ohboiya

Rough_Rock
Joined
Feb 24, 2007
Messages
13
Julie ... thanks for that. I''ve asked what "precision" implies and will post shortly.
 

ohboiya

Rough_Rock
Joined
Feb 24, 2007
Messages
13
precision implies precision of cut .... i have NO idea what that means though :)
 
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