Furqan Shafi

That ring is ridiculously expensive for a 0.7ct centre diamond for an I color I1 grade.

Yep. That is bullshit. The diamond appearance might slightly differ when set and unset but that looks totally off. That is surely does not look like the diamond in the first picture. All that film and residue story is A grade rubbish.

Please help me clear my confusion - 1. You gave the jeweller your diamond loose or set in the ring? 2. Are those pictures of 2 different rings? They look the same. While the 2nd picture has a greyish looking diamond? 3. Is that grey tint in all lighting angles? 4. Also did you finally get your own diamond the next day after cleaning? The explanation sound rubbish to me. There's no cleaning that leaves film lol. Loose unset Diamonds are cleaned easily. Dip in tetrachloride, and clean thoroughly with cleaning cloth that's it.

Comparing side by side, for an average but a keen eye, anything is possible and visible. Between those diamonds I would go for 2nd one. In order of preference it would be 2nd, 3rd and then 1st.

There are no pictures for us to reference anything. But my instinct is that you will be fine.

Diamond wise it's not bad at all. It doesn't even have bad proportions for an excellent cut diamond. It has a nice spread. If you paid right price for it then there's nothing wrong. I wouldn't change a thing.

Chances are this is a modified round brilliant and not just a round brilliant with poor symmetry.

Looks like it. A part of pavillion facet should have been reflecting under the opposite kite facet.

I think it looks beautiful. Blue adds character. However it does come at a cost of absence of other character that you may get in a non fluorescent diamond.

The numbers are good. That crown angle will be more brighter and less fiery. However any differences are mostly unintelligible.

The diamond looks perfectly fine albeit a bit deepish for my liking, nothing wrong nonetheless.

Concerned in what sense?

According to some - on a particular internet forum.

No that's not true.

That difference is a product of crown angle and pavillion angle combinations. Crown angle ranging between 34° - 36° with combination of pavillion angle between 40.6° - 41° will produce better contrast patterns and consequently those black arrows. Those are black because the environment right in front of it is black (because of camera and light being blocked from the front). These could bre any color depending on the environment. The other stone may have different crown and pavillion angle combinations and reflecting other things in the environment instead of the absolute front (camera and darkness because of light blockage).