HCA scoring chart

[Blurpandasg2014]

Hi

I noticed that on the HCA chart, towards the lower region, it is more suited for necklaces while in the upper region HCA 1.3 onwards is for rings ?


Can anyone verify that is true? Can't find materials online to support

 

[OoohShiny]

@Garry H (Cut Nut) is best placed to explain this, but the simple explanation is (if I understand it correctly) lower HCA scores are for shallower stones, which may be at risk of 'excessive' obstruction/contrast when viewed in a ring (because the viewer's head is directly over the diamond, blocking the light and creating the obstruction/contrast, and in a shallower stone most of the light returned will be from the top). I think...??

Pendants and earrings are designed to be viewed face-on but hanging sideways, so the viewer is not obstructing most of the light entering the stone.

FWIW, I think my good lady's ring has a 0.9 HCA stone, and I think it looks great in all lights!

 

[lovedogs]

Someone (maybe @Garry H (Cut Nut) ) posted a great gift about it, but I can't find it.

 

[Krisking]

Here's @Karl_K and @Garry H (Cut Nut) 's explanation:
https://www.pricescope.com/community/threads/all-about-the-hca-holloway-cut-advisor.240661/