Holloway Cut adviser

[golovast]

I put in the specs from the diamond that I am looking at, in the calculator for the Holloway Cut advisor and it came back with a score of 1.5, with Excellent Light Return and Very Good on Fire, Scintillation and Spread. How accurate is this report? Can it be used as a general guideline, or are there other factors (besides color and clarity of course) that may influence how a diamond will look?

Thank you

 

[pricescope]

Golovast, use it as a preliminary filter. A score below 2 means you have eliminated known poor performers (more than 95% of all diamonds). Your own personal preference may be for a diamond with an HCA score of 1.5 more rather than one with a lower score of say 0.5.

There are other factors of course (symmetry, girdle, minor facets, etc).

For example, some stones with HCA<2 can be very bright bat have less contrast or fire and vice versa. Use yor own eyes and other information available.

 

[purduephotog]

Does anyone know if the source is available for the Advisor? I wouldn't mind having it running on my palm while I'm looking at stones, rather than memorizing a bunch of numbers.

Of course there would be issues porting it, but thats no big deal (since thats all I ever seem to do.... heh)

 

[pricescope]

We have desktop version which also takes girdle thickness into account. I would wait a couple of days though to see what GIA will announce in Basel this week.