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OK Despite 58% Table?

Joined
Nov 6, 2011
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2
Would appreciate everyone's thoughts on the following stone with a 58% table. I understand that the updated AGS standards allow for a greater than 57% table to be ideal but wanted to confirm that the measurements below do not raise any red flags with anyone. Thanks in advance.

Round 2.57
Measur' 8.83 * 8.85 * 5.37 mm
GIA Cut Excellent
Depth 60.8%
Table 58%
Crown Angle: 34.0/14.0%
Pav Angle: 41.0/43.5%
Pol/Sym EX/EX
HCA: 1.5

Alternatively, how does this stone with the following measurements stack up compared to stone above?

Round 2.51
Measur' 8.67 * 8.72 * 5.35 mm
GIA Cut Excellent
Depth 61.5%
Table 56%
Crown Angle: 34.0/15.0%
Pav Angle: 40.6/42.5%
Pol/Sym EX/EX
HCA: 0.6
 
Did you run them both through the HCA? Are they both under 2.0? Can you get an ASET of them?
 
An ASET or even ideal scope would be great. But I'd choose #1 if I had to just from the numbers. It has great spread and I think the angles may be more complimentary on that stone.
 
Is there any way to describe the difference of how a HCA 1.5 vs 0.6 will look compared next to each other based purely on numbers alone? I suspect not but am curious. Also, interesting that you remarked the first stone has a great spread when the HCA calculator stated that the spread is only Very Good (not Excellent). Is that comment based purely on the measurements of the stone? Will the first stone look larger that its carat weight because of its spread?
 
I really meant the spread was better than the other one considering the small weight difference. Most ideal cut stones score very good on spread, so don't worry about that. The first one is just going to look just a little larger than the other (8.85 vs. 8.7mm). But I'd still buy the best cut regardless of the tiny difference in size. You'd only notice the difference if you held them side by side, probably.

I have read here that many people prefer an HCA score from 1-2. I am not sure what the possible concerns are (if any) about a .6 and maybe Garry will see this and reply. But I think some stones with a 40.6 crown angle can be rejected. The other stone looks like a safer bet to me, but really, an idealscope and/or ASET would be really helpful in order to make a final decision. Can the vendor do either of those?

https://www.pricescope.com/tools/ideal-scope

http://ideal-scope.com/1.using_reference_chart.asp
 
diamondseeker2006|1323188443|3075289 said:
I really meant the spread was better than the other one considering the small weight difference. Most ideal cut stones score very good on spread, so don't worry about that. The first one is just going to look just a little larger than the other (8.85 vs. 8.7mm). But I'd still buy the best cut regardless of the tiny difference in size. You'd only notice the difference if you held them side by side, probably.

I have read here that many people prefer an HCA score from 1-2. I am not sure what the possible concerns are (if any) about a .6 and maybe Garry will see this and reply. But I think some stones with a 40.6 crown angle can be rejected. The other stone looks like a safer bet to me, but really, an idealscope and/or ASET would be really helpful in order to make a final decision. Can the vendor do either of those?

https://www.pricescope.com/tools/ideal-scope

http://ideal-scope.com/1.using_reference_chart.asp

The shallower stone will have a more striking dark star assuming that the optical symmetry is good.
The darker star will be because of the obstruction of brighter lights being greater in the shallower stone than the 34/41.
There will be very little difference because of the effects of the table size.
I would not reject any stone with 40.6 pavilion angle - not unless:
the crown angle is low - say under 33 degrees.
You have great close up eyesight and are in the habit of examining the stone from 8 inches / 20cm or less
 
Thanks, Garry! Which of those stones do you think is best in that case?
 
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