(Closed) How important is HCA score?

posted 4 years ago in Rings
Post # 2
Member
5161 posts
Bee Keeper
  • Wedding: January 2010

It is an elimination tool, not a selection tool. For GIA and other graded stones (except AGS, as AGS grades performance) it just allows you to narrow it down to what is worth looking further at. GIA “excellent” is very broad and includes a lot of duds, for example.

Anything under 2 is worth looking at further to assess actual performance (get ASETs, Idealscope images, etc). A 0.9 is not automatically “better” than a 1.2, which is not automatically “better” than a 1.9. If something is between 2-2.5 it might be worth another look if the price is very reasonable (i.e buying secondhand). Anything over that, say goodbye to it.

Post # 3
Member
242 posts
Helper bee

RayKay:  Agreed – HCA is meant to be used as a rejection tool.  Once you’ve found stones under the 2.0 rating, you want to use ideal scope and ASET images to make your final selection.  The HCA evaluates performance based on the overall dimensions, but ideal scope and ASET images will show how the light performs when all the facets interact with each other (ie: will show you specific areas of light leakage, brilliance, etc).

Post # 4
Member
193 posts
Blushing bee

If you can, I would definitely use an HCA score.  I didn’t know much about them at first, figuring GIA triple excellent was sufficient for a great cut.  Plugging stones in the HCA calcuator really was eye-opening.  Many stones were scoring in the 3-4 range, if I’m remembering correctly.  My current stone is under 2.  

We didn’t use ideal scope or ASET images to make our final selection, though. Perhaps we should have! 

Post # 5
Member
9281 posts
Buzzing Beekeeper

Mine scores under 2. I can’t remember the exact number, but I think it’s somewhere in the 1.6-1.8 range. Fiance didn’t consider it at all when picking my ring though. I only calculated it much later out of curiosity after finding out what the HCA was.

Post # 8
Member
157 posts
Blushing bee
  • Wedding: September 2006

TheGridMonster:  Your ring is so gorgeous! We used the HCA score and a tool to narrow down what stone we eventually went with, that fit our budget. My round GIA cert from Blue Nile scores a 2. 🙂 

Post # 10
Member
209 posts
Helper bee
  • Wedding: December 2019 - Costa Rica

RayKay :  I totally agree with you… here is the scope. You can definitely get blinded by the bling so the hca tool really helps u price the diamonds. Honestly I seen a 4.5 hca with a not so diseriable aset imagine and was awed by its beauty. In that case you would want to use that information to BRING THAT PRICE DOWN! 

I ended up choosing a GIA 1.8 hca ideal aset and idealscope imagine diamond. I also got the sarin report which give more precise mesuarments and I plugged those numbers in and got a 2.1. I am in LOVE with my ring and the price was just right! 

 

Post # 11
Member
1336 posts
Bumble bee
  • Wedding: October 2016 - Painswick Church and the Falcon Hotel

What is HCA?? 

Post # 12
Member
209 posts
Helper bee
  • Wedding: December 2019 - Costa Rica

Hca tool is a online calculator where u plug in couple of your diamonds measurements from your certificate and it will give u a approximate summary of your diamonds light performance.  Like what ray Kay said it’s a good way to rule out dudes but in my opinion it’s a good way to haggle down the price of a “not so good” light preforming diamond. Of course this is gonna have to be at local jewelers big retailers like zales will just look at you like ur crazy. 

waterg :  

RayKay :  

Post # 13
Member
1336 posts
Bumble bee
  • Wedding: October 2016 - Painswick Church and the Falcon Hotel

naturallyd86 :  that’s interesting! How would I go about doing this? 

Post # 14
Member
209 posts
Helper bee
  • Wedding: December 2019 - Costa Rica

Google hca tool. 

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