Leakage right in the middle of the table the norm?

tenbinko · Dec 17, 2012

Hi everybody, it seems that right in the middle of the table, inside the area where the arrow shafts come together, there's some sort of leakage (or perhaps just weaker light return? Because in some ASET pictures, it looks green instead red). Looking very very closely at Idealscope images, usually, I kind of see a slightly more pink/white area right in the middle.

That's the norm, right? And perfectly OK?

I've attached a GCAL pic showing light return... I've seen such pictures where the middle was totally white, with no gray spots at all, but I'm guessing that's not normal...

I'm worried that I may have purchased non-ideal diamonds... suffering from buyer's remorse, I think, but maybe I'm just worrying too much.

Is the middle not supposed to be completely red in IS or ASET pics (or white in GCAL's light return analysis)?

Thanks a lot.

tenbinko · Dec 17, 2012

P.S. To see the leakage (or is it just normal leakge in all ideal cut diamonds?) in the first GCAL light return picture, you probably have to tilt the screen up or down a bit... if your line of sight is fairly perpendicular to the screen of the computer, you might not see much gray in the middle.

Christina... · Dec 17, 2012

It looks like a beautiful stone, you won't see any leakage.

tenbinko · Dec 17, 2012

Oh, I just wanted to point out that these are actually two different diamonds, but I just wanted to know whether everybody thinks or knows that it's normal for an ideal cut diamond to have the middle appear just a bit less bright than the other areas around it.

I've seen ASET pics where the middle was green, though I've also seen ones where the middle was red... just wondering whether theoretically, the middle should appear a bit less bright.

If not, then, what's causing it to appear less bright, and should that ever be a concern?

Karl_K · Dec 17, 2012

gcal refuses to release any details of its set up for peer review therefor it is hard to comment on the images.
It is not an open standard nor is it accepted by anyone else as a valid measurement because they refuse to submit it for peer review.
What they are doing has been reverse engineered by me from the images but not to the level that minute details like your question can be answered with any accuracy.

tenbinko · Dec 17, 2012

I've found and attached the ASET of a fine make...

What's the green stuff right in the middle?

I swear I've seen the middle being completely red... should it be green or red?

If it's green, is it ever a problem or indicative of less superior cutting?