help-polish and cut advisor tool

[jxhlps]

Hey, I am wondering how accurate or valuable is the cut advisor tool?

I am seeing this diamond which is <1 in cut advisor and then has ''very good'' polish...cut is excellent and symmetry is excellent too...

Is ''very good'' polish something that I need to worry about? Does it mean a very good polish has worse cut than an excellent polish?

And how much should I rely on the score that cut advisor tool? Is a good score 90% chance meaning a good cut? Or the pertentage is much lower?

Thanks a lot for your help

 

[stone-cold11]

What are the numbers you used for the cut adviser? Cut adviser is just a rejection tool not a selection tool, score less than 2 are good for further examination, such as through an Idealscope/ASET image.

Lay person will not be able to distinguish between the top 2 grades of symm and polish, so do not worry about that too much.

 

[Lorelei]

Date: 6/6/2009 3:58:43 AM
Author:jxhlps
Hey, I am wondering how accurate or valuable is the cut advisor tool?

I am seeing this diamond which is <1 in cut advisor and then has 'very good' polish...cut is excellent and symmetry is excellent too...

Is 'very good' polish something that I need to worry about? Does it mean a very good polish has worse cut than an excellent polish?

And how much should I rely on the score that cut advisor tool? Is a good score 90% chance meaning a good cut? Or the pertentage is much lower?

Thanks a lot for your help

The HCA is used for rejection not selection, what it does is to calculate how well a certain set of proportions could work together. The aim is to score below 2 then evaluate from there with ASET and or Idealscope images. So used in the right way for rejection it is an extremely valuable tool.

Tutorial on ASET/ IS images.

http://www.highperformancediamonds.com/index.php?page=education-performance

Polish - good and above are said to look the same to the naked untrained eye, some diamonds won't take a polish finish which is highly graded such as excellent, the same way that some areas of wood won't take a perfect polish as an example.

Read more on polish here.

http://diamonds.pricescope.com/polish.asp

The overall proportions are the main engines which drive the light return of a diamond, not polish and symmetry grades - so it is entirely feasible you could have a diamond with VG polish which is better cut than one with Ex.

I hope you find this helpful