Should girdle size influence the HCA score?

[Aurelio]

Dear all,

Thanks for this great forum, I have learned a lot over the past few days

. I''m planning to buy a diamond ring online (0.5 - 0.7 ct round brilliant AGS ideal 0) and run all prospective candidates through the HCA.

The stones I''m looking at have girdle sizes anywhere between thin and slightly thick whereas the HCA score is for a ''medium'' stone precisely. Now, here comes the question:
Is the girdle size important for the stones optical performance, does it influence the light return? Or is it just important for size/weight and chipping/ non-chipping?

I''m trying to find the maximum sparkling stone (rather than the biggest). Any help will be greatly appreciated.

Regards
Aurelio

 

[Garry H (Cut Nut)]

HCA does account for girdle size - but the charts are set images.
The effect is mostly to do with spread, but there will be a warning if the girdle is too thin.
Read about it here www.diamond-cut.com.au

 

[Aurelio]

Dear CutNut,

Thanks for the information and the link on the website. Reassured by this, I ran all interesting stones through the HCA and picked one that looked pretty good (score 0.7 to 1.2, slight differences in the parameters in the two certificates posted on BlueNile). Now I'm all excited to see what it looks like in reality. Thanks again for all the information and the HCA itself.

Best regards,
Aurelio