help me decide

[pipeline]

You guys Rock!

I''ve narrowed down my search to three diamonds. So i''m wondering if anyone can comment to the cut of the following diamonds. They are all about the same price, but wanted to know if going up one color grade is worth the small percentage hike in price. I don''t think I can tell one color grade difference given these three stones i''m sure they will be brighter than the avg stone...thanks all.

1.015 G Si1
diam: 6.52 - 6.54 mm x 3.93 mm
tOTAL DEPTH: 60.4% / 3.94mm
table: 56.1% / 3.66mm
Crown: 34.7
Pav: 40.6
Pav depth: 42.7 2.79mm
culet: 0.4% very small
Girdle min: 1.2% thin
girdle max: 1.7% med
girdle avg: 1.5% med
polish excellent
symmetry excellent
proportions ideal



1.015 H si1
diam: 6.53 - 6.54 mm x 3.98
tOTAL DEPTH: 60.9%
table: 55.0%
Crown: 34.9
Pav: 40.9
Pav depth: 43.2
culet: pointed
Girdle min: 1.2% - 1.4%

polish ideal
symetry ideal
proportions ideal



1.01 G SI-1
6.53 - 6.56 x 3.93
Total Depth % 60.2
Table Diam % 57
Crown ang 33.7
crown height 14.8
pav angle 40.8
pav depth % 42.7
girdle M - F
culet none


polish exc
symmetry exc
proportions ideal


Thanks

pline

 

[valeria101]

All would be brilliant, but stones #1 and #2 would have the most fire while #3 wold be among those brilliants with less fire. So, my preference would go for the fiery ones

Between #1 ad #2... no idea, really. However, #1 gets right in the middle of the range for best predicted light return, while the other errs on the side. So maybe #1 would be a safer bet... at least by numbers.

There is little else but the "fire versus brilliance" line to tell these finely cut stones apart. You have realy picked three front runners...

For the theory of it, you may want to inspect Garry's intro at Precious-Metals.

 

[pipeline]

if the three stones are all brilliant, but two of them brilliant + fire, the shouldn't the two stones with both components be a better choice than the one with only brilliance? Or will the briliiant stone only be the most brilliant and that is where the decision lies - brilliance vs fire?

Thanks,

pipeline

 

[pipeline]

I found another one.....how would this compare to #1 and #2 stones in the above example?

Carat: 1.06
Color: G
Clarity: SI1
Depth: 60.9
Table: 56
Crown Angle: 35
Crown %: 15.5
Pavilion Angle: 40.9
Pavilion %: 43.3
Girdle: Thin to Medium
Polish: Very Good
Symmetry: Excellent
Culet: None
Fluorescence: No
Measurements: 6.59-6.64X4.03


All theses stones are roughly the same price from three different vendors.

Thanks

 

[valeria101]

----------------
On 5/8/2004 10:55:30 AM pipeline wrote:

If the three stones are all brilliant, but two of them brilliant + fire, the shouldn't the two stones with both components be a better choice than the one with only brilliance?

Or will the briliiant stone only be the most brilliant and that is where the decision lies - brilliance vs fire?

----------------

Well... all this is somewhere in the fine print. In theory, some stones achieve good balance between fire and briliance, and the first two fall dead on. Sine this is a subtle effect, not many would go for extremes (lots of fire and little brilliance, such as the old miners' cut produces, or lots of brilliance with little fire like some rounds with large tables produce).

Also, other interpretations of this issue are possible: the brilliant but not fiery stones requite bright, direct light to work their magic and cope less well with dim light or when looked at closely (when the viewer shadows them). Anyway, the balance is better and this what the "ideal" cut was meant for.

 

[valeria101]

Here's what the scores look like for these three:

Carat: 1.06 , G-SI1, Measurements: 6.59-6.64X4.03
HCA
Light Return Excellent
Fire Very Good
Scintillation Very Good
Spread Very Good
Total Visual Performance 1.8 – Excellent, within TIC range


Carat: 1.015 G Si1, diam: 6.52 - 6.54 mm x 3.93 mm
HCA
Light Return Excellent
Fire Excellent
Scintillation Excellent
Spread Very Good
Total Visual Performance 0.6 – Excellent, within TIC range


Carat: 1.015 H Si1, diam: 6.53 - 6.54 mm x 3.98
HCA
Light Return Excellent
Fire Very Good
Scintillation Very Good
Spread Very Good
Total Visual Performance 1.7 – Excellent, within TIC range

I would not dare say that HCA 1.7 is better than HCA 1.8 - the difference is just way small to be significant. But the distance to HCA 0.6 is quite a bit bigger and I would judge it significant. So the 1.015 G,SI1 with 0.6 HCA got my vote. Given that it's average measurements place it well into the 'idel' range, it is less likely that the variation and error of measurement would through the actual rank off the desirable range. Of course, these numbers and teh HCA give a partial descriptions of the stone. I am surprised that stones with such good credentials are being rpesented to you with no direct test of brilliance (Ideal Scope, H&A viewer, or something!) at all.