my "good" stone sparkles so much

[Sam82]

I''ve mentioned it in other threads, I received a ring from my grandmother. I have no idea how old it is, only that it''s at least 24 years old (but probably more than 30). I had it appraised and the appraiser said that the symmetry and polish were good. So, the cut quality is good. I thought that the stones would be pretty dull. Well, I had it resized and cleaned. I couldn''t believe the fire and scintillation. I''m not talking about only in the fabulous jeweler''s lights. It sparkles in the sunlight a lot and in my home. Is it possible that the appraiser got the cut quality wrong? Or if that''s how a cut grade of good sparkles, I can''t imagine what an ideal would look like in real life. Any comments?

 

[Lorelei]

Date: 9/20/2009 10:20:44 AM
Author:Sam82
I've mentioned it in other threads, I received a ring from my grandmother. I have no idea how old it is, only that it's at least 24 years old (but probably more than 30). I had it appraised and the appraiser said that the symmetry and polish were good. So, the cut quality is good. I thought that the stones would be pretty dull. Well, I had it resized and cleaned. I couldn't believe the fire and scintillation. I'm not talking about only in the fabulous jeweler's lights. It sparkles in the sunlight a lot and in my home. Is it possible that the appraiser got the cut quality wrong? Or if that's how a cut grade of good sparkles, I can't imagine what an ideal would look like in real life. Any comments?

Cut quality is subjective and also it depends on the opinion, experience and skill of the appraiser involved when judging the cut. Also good symmetry and polish don't guarantee any level of cut quality, just that the symmetry in the appraiser or grading lab's opinion is of good standard as is the polish. But the main thing is that you are happy with your diamond - now it has had a good clean especially it can make all the difference!

Some good cut grade diamonds ( either of "official" lab cut grade or non lab cut graded) can be very beautiful depending on the proportions, some said to be of excellent or ideal cut might not be as an example, again depending on the proportions and the expertise of the person making such a statement mainly so no hard and fast rules, probably what you have is what is called a nice make of cut with good proportions, make sure you keep it clean to keep it sparkling!

As an exercise, if you have a Jareds closeby, go and have a look at their Peerless brand which are of AGS0 cut grade, or Hearts on Fire if there is a dealer in the vicinity. That way you can take a look at some diamonds of known cut quality to see how yours compares if you want to see some AGS0 Ideal in action.

The term Ideal Cut in itself is subject to opinion, when we mention Ideal Cut here we are generally referring to AGS0 Ideal with top grades in performance, proportions and finish. You often see vendors use the term to describe their best cut diamonds, but to many here the term ideal cut is assumed to mean AGS0 - or thats how I see it!

 

[stone-cold11]

But on the GIA cut grade, a G score on the polish/symm will on get at best a VG in cut grade.

 

[Lorelei]

Date: 9/20/2009 10:59:31 AM
Author: Stone-cold11
But on the GIA cut grade, a G score on the polish/symm will on get at best a VG in cut grade.

I know, the diamond in question won't have a GIA cut grade as it is 24 years old or more, I think the OP and their appraiser were referring to this diamond generally as having a good cut grade, not " officially" as with GIA grading, and that is how I was referring to it too, not in GIA terms or standards.

 

[kenny]

I thought that polish and symmetry were less important to light performance than those other 4 things: Crown & pavilion angles, depth & table %. . . . .???

 

[strmrdr]

Date: 9/20/2009 12:16:40 PM
Author: kenny
I thought that polish and symmetry were less important to light performance than those other 4 things: Crown & pavilion angles, depth & table %. . . . .???

true, a diamond that is g/g with better angles can look better than a ex/ex with bad angles.
That said g/g can sometimes have a negative impact on performance.

Sam82
Congrates on the diamond, wear and enjoy it in good heath and the best of luck to you.

 

[bgray]

Date: 9/20/2009 12:33:37 PM
Author: strmrdr

Date: 9/20/2009 12:16:40 PM

Author: kenny

I thought that polish and symmetry were less important to light performance than those other 4 things: Crown & pavilion angles, depth & table %. . . . .???

true, a diamond that is g/g with better angles can look better than a ex/ex with bad angles.

That said g/g can sometimes have a negative impact on performance.


Sam82

Congrates on the diamond, wear and enjoy it in good heath and the best of luck to you.

And--the impact of GOOD/GOOD is more or less of a factor depending on the stones shape. i think G/G in square and rectanglular stones and in old mines and cushion is more acceptable than general than in rounds.