No HCA rating?

[tuck2013]

Simple question, but why do some of the diamonds have no HCA rating? Also, how heavily should we weigh the HCA rating for the diamonds?

Thanks!

 

[hawk25]

All round diamonds can have an HCA rating, you just need the right numbers to plug into the HCA calculator.

The HCA was designed as a rejection tool, not as a selection tool. Anything scoring under a 2.0 means that it's worth your time to investigate further. It will reject some good performing diamonds that fall out of its statistical ideal range, but I believe the time and effort it saves makes up for that. It's a tool for consumers, and should be treated as such.

 

[diamondseeker2006]

And you only use it on GIA Excellent cut stones to narrow down the best ones that are likely to have AGS Ideal specs. Stones that are graded AGS Ideal do not need to be put into the HCA!

 

[tyty333]

I think the OP may be talking about when they run the PS search tool. I think it may be the in house stones (where all the needed
values have been entered) vs the virtual stones that don't have all the values entered. You can always get the values and enter them
by hand (tedious I know) .

 

[tuck2013]

Thanks Tyty333. You hit it on the head. I was trying to figure out why some of the stones did not have HCA ratings on the PS search, but I figured it out. Looks like I'll have some work to do.

 

[SB621]

I will just add on to use it for MODERN RB's. Antique (tranny, OEC's etc) I wouldn't bother with the HCA.