Size vs Light performance

[munchee]

Hi everyone, thank you for being so helpful to me in the last couple weeks. I now have a new question to ask. I hope you all can give me another enlightenment.

So I’m in love love love with my 0.8ct D ACA engagement ring center stone. Its very very lively, in every single corner. It just sparkle sooo sooo prettily. Everything about it is good, but the size. I’ve been using this 0.8ct ACA as a standard for a bigger diamond that I am currently searching for. I’m looking for a 2.8ct-3ct G/H.
My questionare, is it possible to expect larger diamond (9mm-ish) to give big and small flashes like what I got from the 0.8ct? Or big diamond will only give big flashes and its impossible for a 9mm diamond to give small flashes in every corner? Is my expectations of what I’m looking for in a large diamond being unrealistic? Or I can find a 9mm diamond that can give out big and small flashes and can sparkle in every corner?

Thank you in advanced

 

[foxinsox]

I don’t have a 9mm diamond (yet! #goals) but I don’t think you’ll only get big flashes - there’s still a lot of smaller facets in a larger stone and the scintillation you seem to be enjoying so much of bigger and smaller sparkles will still occur. The cut is what determines that and if you’re staying with an ACA or other ideal cut stone, there’s no reason you’d not get this effect.

 

[Karl_K]

yes you will get small flashes on the larger diamond areas that are 2 small to produce visible flashes on a small stone are bigger in the bigger diamond and produce visible flashes.
In general 2nd order reflections are the ones that define diamond performance but as diamonds get bigger 3rd and 4th order kick in.

 

[mtran89]

It’s too bad that there are no E or F stones currently available that I could upgrade to because I think maybe my current stone is something you are currently looking for.

It’s a spready 2.738 G VVS2 ACA over 9mm (9.06-9.11).

I did have a smaller 1.2 carat from GOG in the Ascendancy line before and I feel like the difference is my current stone has noticeably bigger flashes of light and some smaller ones as well. The smaller stone looked like all small flashes of light.

 

[munchee]

yes you will get small flashes on the larger diamond areas that are 2 small to produce visible flashes on a small stone are bigger in the bigger diamond and produce visible flashes.
In general 2nd order reflections are the ones that define diamond performance but as diamonds get bigger 3rd and 4th order kick in.

I’m sorry can you describe this like you’re describing it to a noob, I really want to understand this but my knowledge is not there yet

 

[munchee]

It’s too bad that there are no E or F stones currently available that I could upgrade to because I think maybe my current stone is something you are currently looking for.

It’s a spready 2.738 G VVS2 ACA over 9mm (9.06-9.11).

I did have a smaller 1.2 carat from GOG in the Ascendancy line before and I feel like the difference is my current stone has noticeably bigger flashes of light and some smaller ones as well. The smaller stone looked like all small flashes of light.

I took a look a 8.84mm couple weeks ago, it does have big flashes, couple small flashes but the small flashes are not as much as the small diamond I have. While its pretty, its still under my desire-able size, so I returned it to keep my options open to other vendors too.
You got yours at a very good price!!!!! I don’t think we can find other 9mm super ideal G VVS2 at that price!!
I wish I can shop a diamond in person to see what it looks like, not depending on certificate which might not be like how I thought it’ll be

 

[Karl_K]

I’m sorry can you describe this like you’re describing it to a noob, I really want to understand this but my knowledge is not there yet

This is super complex but I will try and simplify as much as I can. This article covers virtual facets, its about step buts but its the same with all faceted stones of any shape.

Virtual Facets and patterns, a Discussion about step cuts.

This is the next article in the discussion of step cut diamonds. The main goal of this article is to show how virtual facets form patterns in diamonds. This is […]

www.pricescope.com

This image shows the 2nd order or if you will draft+double reflection. In other words they represent larger less complex iterations of the actual facets, there are more complex interactions that in smaller stones are not active to a large extent because they are very small.
In a larger diamond these smaller virtual facets can become more active as they get larger because the diamond is larger.
That is why a larger diamond will still have small flashes.

However at any size the larger 2nd order aka draft+double refection are the most active.

 

[munchee]

Thank you so much for your kind explanation @Karl_K !!!!! I think I kinda understand