Cut Grading

[wetseel22]

Just wonder why a diamond with these specifications: 61.3% depth, 59% table, 32.5° crown angle, 41.8° pavilion angle would get a grade of only 5 (Good)?

 

[Lorelei]

Date: 6/8/2009 2:00:56 PM
Author:wetseel22
Just wonder why a diamond with these specifications: 61.3% depth, 59% table, 32.5° crown angle, 41.8° pavilion angle would get a grade of only 5 (Good)?

Do you mean on the Holloway Cut Advisor or GIA cut grading? The very steep pavilion angle is going to downgrade it in both most likely, this is not a well cut diamond unfortunately.

 

[Todd Gray]

It gets a 5.5 Good "only if price is your main criteria" on the HCA because the crown angle is STEEP! Try to find an option with a crown angle between 34.3 - 34.8 offset by a pavilion angle between 40.6 - 40.9 degrees and then see how that scores on the HCA (better) and then find an option with a table diameter in the range of 54 - 57% and see how that does (better)... Remember that the pavilion angle is the primary reflective surface of the diamond in terms of light return - there tends to be a considerable drop in light return when you cross over the 41.2 pavilion angle. Crown angle has more of an effect on the type of light return (brilliance / dispersion).

 

[wetseel22]

Holloway Cut Advisor

 

[Lorelei]

Date: 6/8/2009 4:07:08 PM
Author: wetseel22
Holloway Cut Advisor

Ok, thought so - thank you. Is this a diamond you are thinking of buying?

 

[wetseel22]

Yes - diamond

 

[Lorelei]

Date: 6/8/2009 4:11:50 PM
Author: wetseel22
Yes - diamond

Is it one you want to buy or one you have already purchased? If it is a diamond you are thinking of buying, my advice is to keep looking.

 

[wetseel22]

I am still in the looking process at the moment

 

[Lorelei]

Date: 6/8/2009 4:29:27 PM
Author: wetseel22
I am still in the looking process at the moment

Ok, I would advise crossing this one off your list.