Pricescope cut advisor tool accurate?

[juvehill]

I have been using the pricescope cut advisor tool and have found gia "very good" even "excellent " cut grades that dont score very well with the pricescope tool ? why is that? is that tool accurate? please help!

 

[JohnQuixote]

This thread may be helpful.

 

[whatmeworry]

The Holloway Cut advisor tool gives an opinion on cut grade, just as AGS and GIA give their opinion on a cut grade. Because the methodologies they use to evaluate cut are all different, you would expect different opinions at times. There are stones that score well on all three (everyone agrees) and stones that score well in one but not well on the others (disagreements). The thing I like about the Pricescope tool is that you can see where HCA, AGS, and GIA may possibly grade the cut.

 

[Regular Guy]

Date: 9/13/2007 6:42:09 PM
Author: JohnQuixote
This thread may be helpful.

After some reflection (oops), John, although the info from Garry illuminates some background for the differentiation, the solution for the problem...to the extent a mono vision paradigm is a culprit to be concerned about...the solution remains elusive for those seeking tighter confirmation without AGS0 for light performance confirmation. For example, although reflector technology was pointed to in that same thread, we're reminded here (see the comment from "Pricescope" on p. 2) that it, too is a mono vision tool, and further, there's an additional tautology to the logic, since the IS was used in the development of the HCA.

 

[aljdewey]

Date: 9/13/2007 6:28:23 PM
Author:juvehill
I have been using the pricescope cut advisor tool and have found gia 'very good' even 'excellent ' cut grades that dont score very well with the pricescope tool ? why is that? is that tool accurate? please help!

Why is that? Because the cut advisor tool is not a selection tool.....its role is to eliminate stones that are less likely to perform optimally. That doesn't mean all stones that scores less well on the cut advisor are definitely bad choices or don't perform well; it just means that they are less likely to than other stones.

Its goal is to help narrow your choices to stones that are most likely to perform optimally.

 

[Regular Guy]

Again ricocheting from the source...

Date: 9/13/2007 6:28:23 PM
Author:juvehill
I have been using the pricescope cut advisor tool and have found gia ''very good'' even ''excellent '' cut grades that dont score very well with the pricescope tool ? why is that? is that tool accurate? please help!

or not...JohnQ''s link above spins a self depreciating Garry, but that post of Garry''s also includes a helpful link...drawing you to another set of links, and generally, a dominant sentiment here...which is that GIA''s excellent is a) too inclusive generally, and b) leaning towards steep deep...which, additionality, is at some variance to the HCA''s converse preference to shallow. Garry''s own linked work is here, but it is reflected in other''s work, also found at the link sourced in John''s post above.

 

[strmrdr]

My take on the HCA after years of study is that its a decent tool when properly considered and applied.
If the rest of the tools/results disagree with it then I ignore it.
If im buying from a list then it would be very valuable as a filter.
When looking at stones there is a lot of other info available on and have been inspected by someone I respect then its less important.
In some ways as it stands today its a bit outdated with more research, technology and data being available from the major labs and MSU.

Another take on the hca is here:
http://www.goodoldgold.com/Technologies/AConsumersGuidetotheHCA/
Some of it I agree with some I don''t but it gives an overview of the strengths and weakness and one persons opinion on those issues.