help...how can i get an HCA score for my diamond

[nikol333]

I would like to find out how to go about getting an HCA score done. We just bought a diamond that is GIA cert. 1.85 E SI2 premium cut.
7.82-7.87x4.90
Depth:62.5%
Table 59%
Girdle: MED to THK, F
Culet: None
Polish: Good
Symmetry: Good
Fluorescence: None

And there is another diamond I''m looking at EGL cert. H VS2 1.75c
7.92-7.84x4.73
Depth 60%
Table width 58%
Crown Height 13%
Pavilion Depth 44%
Girdle thickness: thin, faceted
Ex polish and symm
no culet
very slight blue

 

[valeria101]

For the first stone you would need to obtain the crown and pavilion angles (or %) first... There is enough info on the second though and the HCA score can be generated online using the Cut Adviser

The second stone gets a rather good score on the HCA, keeping in mind that results obtained using % instead of angles are less precise...

The HCA reads:
"Light Return - Very Good
Fire - Very Good
Scintillation - Very Good
Spread - Excellent
Total Visual Performance 2.3 (Very Good - Worth buying if the price is right)."

I should note that very few stones get Ex on "spread" without loosing lots on the other grades. Thsi is one attractive piece...

 

[robbe]

1st stone looks nicer.


robbe

 

[pyramid]

https://www.pricescope.com/cutadviser.asp

Above is the link for the cut advisor it has a working link at the top of the rockytalky page.

 

[Mara]

Hmmm I personally would not buy either of them. You need crown and pav information for the first one to get more information though.




The first has a table and depth I don't like and the polish and symm are only Good. Also the thick girdle, hiding some weight.




The second has too wide of a range of diameter spread for my taste, and the crown and pav %'s are a little off. Plus the HCA score is over 2.0 which in my mind is not an 'excellent' cut.




I would consider the first one from information given to be a 'Good' cut and the second to be 'Better'...but neither are 'Best' IMO.