bowtie effect - is that a nonissue?

[pws]

Hi, folks.

I'm thinking of buying an OMC stone.
It is my first time buying a shape other than round brilliant.
And apparently, there are some stuff you need to consider that you don't have to when buying a round brilliant.
A bowtie effect, for instance.
I'm guessing it is really not aesthetically pleasing but as far as light performance is concerned, is it a nonissue?
I'm asking because someone on the Internet posted these pictures and said that she was surprised to see the bowtie-looking dark patches in her OMC stone, but
those dark areas are also where she gets the big flashes of color.







And I'm confused about whether it is a bad thing to avoid or a nonissue in case you only care about light performance.

And what about fish eye effect in an OEC stone?
Is it something to avoid or a nonissue light-performance-wise?
Is it what causes something like the following picture - sparkly only around the edges with the center lifeless?



Thank you in advance

 

[Dreamer_D]

lol. Neither of those are well cut stones. The first does not look like a true antique and it is not desirable for half the table to go dark. Fish eye is not desirable. Does that diamond look pretty to you? I doubt it. You might want to do some reading in PS about old cuts. There’s so many threads explaining how to evaluate cut.

 

[lulu_ma]

Feel free to post stones that you are considering here for assessment (preferably after you have time on hold bc there are lurkers on here).

Or, let us know what your parameters are-ctw, color, clarity, budget etc and we may be able to help you find a good one.

Btw, old cut centers usually have a pinwheel or floral patterns.

 

[Garry H (Cut Nut)]

You got great advice. Nothing to add

 

[JoshuaJGustafson]

Hi, folks.

I'm thinking of buying an OMC stone.
It is my first time buying a shape other than round brilliant.
And apparently, there are some stuff you need to consider that you don't have to when buying a round brilliant.
A bowtie effect, for instance.
I'm guessing it is really not aesthetically pleasing but as far as light performance is concerned, is it a nonissue?
I'm asking because someone on the Internet posted these pictures and said that she was surprised to see the bowtie-looking dark patches in her OMC stone, but
those dark areas are also where she gets the big flashes of color.







And I'm confused about whether it is a bad thing to avoid or a nonissue in case you only care about light performance.

And what about fish eye effect in an OEC stone?
Is it something to avoid or a nonissue light-performance-wise?
Is it what causes something like the following picture - sparkly only around the edges with the center lifeless?



Thank you in advance

While some pieces with dark patches are aesthetically unpleasing, others argue that if the stone produces brightly colored flashes, it may not be a significant issue in terms of overall light performance.

 

[Garry H (Cut Nut)]

While some pieces with dark patches are aesthetically unpleasing, others argue that if the stone produces brightly colored flashes, it may not be a significant issue in terms of overall light performance.

True Joshua, However this depends on the length of time / angular shift required for the color and brightness flash to occur.
In RBC's this is almost instantaneous.

BTW if you are in the trade yo need to click the trade badge or click report concern and have Ella do it for you. You can be banned otherwise.