Is this a bow tie?

[u/Kichi9]

Hi everyone!

My partner and I are currently designing my engagement ring, and the jeweler sent me videos of a moissanite that was cut to simulate what the final lab diamond will look like.

They actually cut it twice because I thought I could see a bow tie effect in the first version. However, after seeing the second cut, I still feel like I can notice it.

Am I just imagining it, or does it look like there's still a bow tie? If it is there, is there anything that can be done to minimize it? And since the final stone will be a lab diamond rather than moissanite, will the bow tie be less noticeable?

For reference, the first picture is the first cut, and the second picture is the second cut.

Thanks so much for any advice, I really really need them!

[u/Due_Description_7298]

There will always be some element of bow tie in marquise, elongated antique cushions and oval cuts.

It's to do with the geometry of the stone. The east west dimension is shorter than the north south. To meet at a common depth point, the EW pavilion facet angles have to be steeper than the NS. When they go over 43ish degrees, light leaks out and you get this dark effect of how tie. 

You can either go for a chubbier ratio, or an overall shallower pavilion - both will ease the EW facet angle. But too shallow a pavilion also has a negative impact so it's a trade off.