cushion cut - polish/symmetry advice

[HoratioNelson]

Hi all,

I've just seen what looks like a very attractive stone.

It's a 1.52ct F VS2 cushion cut, table is 65% and depth is 67.8% (roughly, I think). Faint floruesence. GIA cert. Size is 6.7mm x 6.15mm

In the flesh, it looked beautiful, but there was one thing slightly holding me back.

On paper, it has [only] Good and Good polish and symmetry.

A few really naive questions:
- How bad is this?
- Given that the table and ratio don't seem too anomalous (does that even relate to polish/sym?) is there any reason they only have G, G grades?
- Should this sort of grade result in a much lower price, compared a stone with the same specs but otherwise VG or EG in those criteria?

I think out of all the stones I've seen, this looks the most attractive and every other criteria ticks the box. Jsut a bit anxious about the G, G. Any thoughts/advice welcome!

 

[HoratioNelson]

I should add, I'm also a bit confused as I have seen diamonds with a G, G rating given "excellent" cut (although I know GIA don't necesasrily give this cut gradings; it is probably the retailers). Equally, I've seen diamongs with VG/EX polish and symmetry, for example, given only a good cut rating.

 

[diamondloveaffair]

A few really naive questions:
- How bad is this?
Can you see significant issues with your naked eye? If you can't, the symmetry and polish should be OK

- Given that the table and ratio don't seem too anomalous (does that even relate to polish/sym?) is there any reason they only have G, G grades?
No relation at all.

- Should this sort of grade result in a much lower price, compared a stone with the same specs but otherwise VG or EG in those criteria?
Yes. in general.

Note that the cut grading of a fancy cut stone is assigned by the vendor and not found in the grading report. There is no direct correlation that a G/G diamondwill not be brighter or prettier than a Ex/Ex diamond. It's the overall proportions that matter most.

 

[HoratioNelson]

Thanks. I'll have another look at it Tomorrow.

I'm just slightly hesitant as, for all the 100+ stones I've looked at on paper, online or in person, I don't recall seeing any with G/G for symmetry and polish.

 

[HoratioNelson]

Bought this diamond today!

It has really great fire, especially when held below in the dark shadow beneath a table. Lots of white medium size flashes in the centre under the table and no crushed ice appearance. Given that it's modified brilliant cushions I'm looking at, I concluded that the firey/sparkle quality has to override anything like G/G polish/symmetry.

 

[HoratioNelson]

I will of course post some pics once I have it (loose or in the ring).

 

[ariel144]

With fancy cuts the polish and symmetry are not as important as MRB. The proportions of the cut is what makes the stone beautiful as stated above.

What is the facet pattern of your cushion? Modified or cushion brilliant?

congrats on your purchase and looking forward to the pics.

As seen in these high performing generic cushions on GOG some have good symmetry and some have good polish:

http://www.goodoldgold.com/diamond/8188/

http://www.goodoldgold.com/diamond/10520/

http://www.goodoldgold.com/diamond/10580/