Ritani has a lot of stones that are HCA 4.5 to 5.5

[zz00ter]

After viewing a Ritani stone I bought I am not happy with it due to milkiness which I was assured would not be there (VS Flo)

So I started looking for another diamond and was blown away how many diamonds they have that are EX on GIA grading but have HCA scores between 4.5 and 5.5

How can stones that get HCA 4.5 to 5.5 get a GIA score of EX and be listed on Ritani as IDEAL?

 

[pyramid]

https://www.pricescope.com/community/threads/gia-excellent-steep-deep-diamonds.93735/

This link (above) will explain this to you. There is a lot written on this subject, if you search under the words
'steep deep'.

 

[ChristineRose]

I am not sure what Ritani considers as ideal. GIA does not use that term.

The GIA grades stones as excellent that the HCA considers to be too deep, but the GIA doesn't do it that way just for fun. They showed a bunch of stones to people and found that many people actually liked the deeper ones better. From one way of looking at the HCA does indicate certain optical performance metrics are better, from another way of looking at it the HCA is just one man's opinion on a whole bunch of optical factors that can't all be maximized on the same stone.

For better or for worse, many stones are now cut to be right on the edge of the GIA excellent range so that they retain as much weight as possible and still hit the excellent grade. Ritani may or may not be seeking out these sorts of stones but it does seem like a good way to maximize profit and still carry GIA excellent stones.

 

[pyramid]

I am not sure what Ritani considers as ideal. GIA does not use that term.

The GIA grades stones as excellent that the HCA considers to be too deep, but the GIA doesn't do it that way just for fun.

No the GIA does it for the trade and profit not for beauty and the consumer.


Below is a post from Brian Gavin at the time of the new cut grade, notice GIA used some of their own staff and not the public in the viewing

https://www.pricescope.com/community/threads/gia-ex-let-the-buyer-beware.41371/

 

[diamondseeker2006]

The HCA is useful in narrowing down the better stones in the very broad GIA Excellent range. But even then, it is best to have the idealscope image to know for sure.

 

[ChristineRose]

I am not sure what Ritani considers as ideal. GIA does not use that term.

The GIA grades stones as excellent that the HCA considers to be too deep, but the GIA doesn't do it that way just for fun.

No the GIA does it for the trade and profit not for beauty and the consumer.


Below is a post from Brian Gavin at the time of the new cut grade, notice GIA used some of their own staff and not the public in the viewing

https://www.pricescope.com/community/threads/gia-ex-let-the-buyer-beware.41371/

Have you read this?

http://www.goodoldgold.com/content.php?c=122

The numbers are not straightforward, and there is a certain amount of controversy on the subject. I'm no expert, but I do know that the majority of experts are not on the side of the HCA. A lot of factors go into what makes a diamond appear one way or another, and the GIA looks at more of them than does the HCA. Any given person may like the one or the other more, but it's wrong to say it's simply a matter of GIA being too loose with their standards.

 

[pyramid]

Thanks ChristineRose . No I have never seen the GoodOldGold writeup about steepdeeps. Will have to read it.