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Opinions on two diamonds

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bananaboy

Rough_Rock
Joined
Nov 11, 2008
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12
Hi,

I have two diamonds and I put them through the HCA, one in EX cut and other is VG but the VG seems better under the HCA.

Diamond #1

Depth: 61.8 %
Table: 58 %
Crown Angle: 35.5°
Crown Height: 15 %
Pavilion Angle: 41.2°
Pavilion Depth: 43.5 %
Star length: 55 %
Lower Half: 75 %
Girdle: Thin to Medium, Faceted
Culet: None

HCA : 4.5

Diamond #2

Depth: 61.3 %
Table: 58 %
Crown Angle: 34°
Crown Height: 14 %
Pavilion Angle: 41.2°
Pavilion Depth: 43.5 %
Star length: 50 %
Lower Half: 80 %
Girdle: Medium to Slightly Thick, Faceted
Culet: None

HCA: 3.1

The 2nd diamond is VG.

Should I even consider these or should I do futher analysis by observing them?
 
The first diamond is what we call a steep deep with the crown and pav angles, GIA Excellent cut grade is broad and can allow for these combos which may be lesser performers - pass on that one. The second diamond looks to have better balanced angles, so I would ask for an Idealscope image of this diamond, especially as it has a steeper pavilion angle, these don't always score so well on the HCA, but an Idealscope image would be very helpful to get a better idea.

Do you have the polish and symmetry grades for the second diamond?

Do you have any others in mind?
 
#1 is a waste of time, # 2 could be OK if it is paitned a bit and or has great optical symmetry, but we need more info to tell
 
What are the specs you are looking for? Are you trying to find D's VVS1 or 2?
 
Thanks for quick replies! Much appreciated.

Here are more stats:

#1

Polish: Excellent
Symmetry: Excellent
Fluorescence: None

#2

Polish: Good
Symmetry: Excellent
Fluorescence: None

--

One question, does the HCA lie or is it a pretty accurate in weeding out bad ones (ie observation by trained eye can debunk all calculations?) - or such as this article http://www.goodoldgold.com/4Cs/NewCutGrading/GIAExAGSIdeal/ where ppl chose the the higher HCA over the lower one

I''m looking for brilliance (sparkle)
41.gif


--
Swingirl: yes, VVS2 D
 
Date: 11/23/2008 4:18:36 AM
Author: bananaboy
Thanks for quick replies! Much appreciated.

Here are more stats:

#1

Polish: Excellent
Symmetry: Excellent
Fluorescence: None

#2

Polish: Good
Symmetry: Excellent
Fluorescence: None

--

One question, does the HCA lie or is it a pretty accurate in weeding out bad ones (ie observation by trained eye can debunk all calculations?) - or such as this article http://www.goodoldgold.com/4Cs/NewCutGrading/GIAExAGSIdeal/ where ppl chose the the higher HCA over the lower one

I''m looking for brilliance (sparkle)
41.gif


--
Swingirl: yes, VVS2 D
The HCA is intended to eliminate lesser performers, it isn''t used for selecting stones - I am only a consumer but I have seen the HCA be of great help to many over the years if used in the right way.. So bascially the aim is to score 2 or below then evaluate these with Idealscope and trusted vendor/ appraiser input.
 
Date: 11/23/2008 4:42:14 AM
Author: Lorelei

Date: 11/23/2008 4:18:36 AM
Author: bananaboy
Thanks for quick replies! Much appreciated.

Here are more stats:

#1

Polish: Excellent
Symmetry: Excellent
Fluorescence: None

#2

Polish: Good
Symmetry: Excellent
Fluorescence: None

--

One question, does the HCA lie or is it a pretty accurate in weeding out bad ones (ie observation by trained eye can debunk all calculations?) - or such as this article http://www.goodoldgold.com/4Cs/NewCutGrading/GIAExAGSIdeal/ where ppl chose the the higher HCA over the lower one

I''m looking for brilliance (sparkle)
41.gif


--
Swingirl: yes, VVS2 D
The HCA is intended to eliminate lesser performers, it isn''t used for selecting stones - I am only a consumer but I have seen the HCA be of great help to many over the years if used in the right way.. So bascially the aim is to score 2 or below then evaluate these with Idealscope and trusted vendor/ appraiser input.
She knows her stuff :-)
 
Date: 11/23/2008 4:58:39 AM
Author: Garry H (Cut Nut)


Date: 11/23/2008 4:42:14 AM
Author: Lorelei



Date: 11/23/2008 4:18:36 AM
Author: bananaboy
Thanks for quick replies! Much appreciated.

Here are more stats:

#1

Polish: Excellent
Symmetry: Excellent
Fluorescence: None

#2

Polish: Good
Symmetry: Excellent
Fluorescence: None

--

One question, does the HCA lie or is it a pretty accurate in weeding out bad ones (ie observation by trained eye can debunk all calculations?) - or such as this article http://www.goodoldgold.com/4Cs/NewCutGrading/GIAExAGSIdeal/ where ppl chose the the higher HCA over the lower one

I'm looking for brilliance (sparkle)
41.gif


--
Swingirl: yes, VVS2 D
The HCA is intended to eliminate lesser performers, it isn't used for selecting stones - I am only a consumer but I have seen the HCA be of great help to many over the years if used in the right way.. So bascially the aim is to score 2 or below then evaluate these with Idealscope and trusted vendor/ appraiser input.
She knows her stuff :-)
* blush*!!! Thats a huge compliment coming from you Garry - thank you! And I also want to thank you for all the fantastic info you have provided that I have been able to learn from!
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