"Reverse Bowtie" in marquise?

[diamondhoarder]

Hi cut experts!

Years ago I had a marquise ring with a bit of a bowtie and unimpressive performance overall which I eventually sold. But I did love the marquise outline shape on my finger. Fast forward to now and I'm looking at marquises again.

I've looked at a few loose stones in person and a couple had what I could only describe as a reverse bowtie, where the belly was the brightest part of the stone.

This isn't the best pic but it gives an idea of what I mean:



Is this reverse bowtie effect considered to be desirable? I would definitely prefer to have a bright band across the diamond than a dark one.

Is it cut proportions which create this effect or the facet pattern?

 

[Karl_K]

facet pattern

Different facet pattern.
Yes they can be very nice.
In some cases the ends can be over dark in this design.
You get a bright part in center and darkness in the rest of the stone.
It needs to balance out.

 

[diamondhoarder]

Different facet pattern.
Yes they can be very nice.
In some cases the ends can be over dark in this design.
You get a bright part in center and darkness in the rest of the stone.
It needs to balance out.

Hi @Karl_K

Do you have any plots that you could post showing the difference between the facet patterns?

I just posted some pics of an LGD which I think is a similar type of cut to this in the LGD forum. If you have a moment, would you mind having a look and letting me know your opinion on it please?

 

[tyty333]

The stone you posted looks to be an 8 main offset from the center. Pretty standard for most marquises.

Here is an 8 main that is not offset from the center

https://www.jamesallen.com/loose-diamonds/marquise-cut/1.01-carat-e-color-vs1-clarity-sku-23364551

Here are a couple of 6 mains

https://www.jamesallen.com/loose-diamonds/marquise-cut/1.01-carat-d-color-si1-clarity-sku-22804868

https://www.jamesallen.com/loose-diamonds/marquise-cut/1.01-carat-g-color-si1-clarity-sku-23574741

4 main (I usually find these in shallower depths)

https://www.jamesallen.com/loose-diamonds/marquise-cut/1.01-carat-h-color-vs2-clarity-sku-24511057

https://www.jamesallen.com/loose-diamonds/marquise-cut/1.00-carat-g-color-vs1-clarity-sku-24381452

 

[Karl_K]

This is an oval but the idea is the same.
Point A is rotated to point B changing the orientation of the facets.

 

[tyty333]

This is an oval but the idea is the same.
Point A is rotated to point B changing the orientation of the facets.

This is what I've been calling "offset from the center". Is there a real name for it, though? It really would make them easier
to talk about!

 

[Karl_K]

This is what I've been calling "offset from the center". Is there a real name for it, though? It really would make them easier
to talk about!

I usualy call them "rotated pavilion" but lets check with Garry and Dave if there is a more official name:
@Garry H (Cut Nut) @oldminer