Dead spot in ACA

[Caly27]

Hi all,

My upgrade just arrived, and I love it already. It has great sparkle in most situations. But I’ve noticed that it goes dead in the center when tilted. This never happened with my old stone so I’m wondering what’s up. I attached a picture that seems to capture the effect.

 

[KristinTech]

Ooh! Congrats! The pros will be along to comment, but until then—please post more pictures!! The setting looks gorgeous... those prongs!

 

[bmfang]

Obstruction from your head and/or the camera

 

[Caly27]

Ooh! Congrats! The pros will be along to comment, but until then—please post more pictures!! The setting looks gorgeous... those prongs!

Thanks! I got it as a temporary setting because I’m planning on going bigger in the near future. But for under $250, I’m pretty impressed with it.

And I will be sure to post more photos in smtb once I redo my nails. (They’re a mess.)

 

[Caly27]

Obstruction from your head and/or the camera

I definitely notice it without the camera, but I’ll try strolling around tomorrow and looking to see if it changes with angles. (And it’ll give me an excuse to stare at it some more.)

 

[kmoro]

I definitely notice it without the camera, but I’ll try strolling around tomorrow and looking to see if it changes with angles. (And it’ll give me an excuse to stare at it some more.)

I think I read somewhere on PS that this darkness in the center is something that only happens with well cut diamonds - due to lighting - and that poorly cut diamonds look more flat white at all angles.

?

 

[tagafabo]

Hi all,

My upgrade just arrived, and I love it already. It has great sparkle in most situations. But I’ve noticed that it goes dead in the center when tilted. This never happened with my old stone so I’m wondering what’s up. I attached a picture that seems to capture the effect.

Caly27 Your ring is beautiful! I am so glad you asked this question as I have the same issue with my ACA. Following ...

 

[Lovesparklesparle]

Dark colours reflecting back out/obstruction. Can be from your head, camera, clothes etc.

 

[kmoro]

Dark colours reflecting back out/obstruction. Can be from your head, camera, clothes etc.

Yes but I think that doesn’t explain why her old diamond didn’t have the same issue?

 

[OoohShiny]

The thread on BGB stones that has come up in the Related Threads box under the first post in this thread may be useful!

(Phone is refusing to copy and paste, grrr.)

 

[crbl999]

Here is the link to that thread.

https://www.pricescope.com/community/threads/bgb-dead-spots-from-certain-angles.235258/

 

[Karl_K]

Here is the link to that thread.

https://www.pricescope.com/community/threads/bgb-dead-spots-from-certain-angles.235258/

This is actually different.
Little to No light from 45 to 75 degrees where the diamond is looking.

 

[Golden_bird]

I think your diamond looks stunning!! What’s your thoughts about “I’’ color ??

 

[Karl_K]

btw a car with a black interior does not do good things for your diamond viewing pleasure.

 

[Caly27]

btw a car with a black interior does not do good things for your diamond viewing pleasure.

I’ll keep that in mind. This was taken in my house with a gray blanket over my lap. I think it must just be tied to the angle and what it’s pointed at. Generally, it’s beautiful.

 

[Karl_K]

To expand a little:
Like everything with diamonds there are always trade offs.
Tight well cut RB diamond are more directional, meaning that they draw light from a smaller area around them to return to the your eyes.
This can lead to this happening a little more often, but you gain more overall brightness and balanced contrast in other lighting.

 

[flyingpig]

Before you look at a diamond, you need to look at what the diamond is looking.

 

[Caly27]

Comparison shot with my old ring:






Please pardon the nails.

 

[Karl_K]

See image.
I apologize in advance, I am not trying to insult your old diamond by calling it steep deep I am just stating a fact to explain what you are seeing.

 

[gm89uk]

In the first photo the new diamond is pointed a little more to the left,
In the second photo the new diamond is tilted more towards you. Really for a proper comparison they should be parallel and close as possible. It's also much larger so you might be noticing the obstruction more.

@Karl_K I think maybe the old diamond is also not facing the camera perpendicular like the new one

 

[Caly27]

Yeah, I should have prefaced to say that I’m not really concerned about the spot that appears sometimes, it was more about the fun of seeing them side by side. I’ve tried to get a straight on photo of both but my phone will only focus in on one at a time unfortunately.

 

[Karl_K]

@Karl_K I think maybe the old diamond is also not facing the camera perpendicular like the new one

A bit, but it is also steep deep to the point the arrows are not at an angle to obstruct they would be red in ASET.

Edit: sorry you were correct and I was wrong.

 

[Caly27]

See image.
I apologize in advance, I am not trying to insult your old diamond by calling it steep deep I am just stating a fact to explain what you are seeing.

No apology needed—I enjoy learning. I think part of it may be a bad photo on my end. (Can’t get a straight on photo of each at the same time, and I’ll admit that I haven’t given it a good scrub in awhile.) I’d love to learn more about my current one. I’ve really liked it and see the arrows regularly. I’ve attached the cert and the ASET my fiancé received when he purchased it. The ASET certainly isn’t on par with an ACA, but I thought it was pretty good for something that was a fair bit less expensive.

 

[Karl_K]

It is a well cut diamond. Angles are good and ASET is good.

 

[Karl_K]

If that ASET is your original diamond then I have to eat a bit of crow for drawing a conclusion from a photo in unknown lighting,

 

[Caly27]

If that ASET is your original diamond then I have to eat a bit of crow for drawing a conclusion from a photo in unknown lighting,

It is for my original stone. The numbers below are for my new one. And it’s my fault for posting something with a bad angle and unclean stone. My apologies. I wasn’t really thinking in terms of cut comparison when I did it.

 

[Karl_K]

Adds salt to the crow and chows down.
Its my fault, I should have asked for more information.

 

[blueMA]

I think I read somewhere on PS that this darkness in the center is something that only happens with well cut diamonds - due to lighting

No, this is incorrect. The whole diamond can look dark under certain spot lighting with super-ideals, not just in the center.

But I’ve noticed that it goes dead in the center when tilted. This never happened with my old stone so I’m wondering what’s up.

You can find your answer here. You're seeing a bit of clustering causing an obstruction.
https://niceice.com/diamond-grading-101/obstruction-light-diamonds/

 

[Jelly88]

This is really interesting. Does anyone know if there are certain proportions outside of superideal that would less likely result in dead spots? Would 60/60 stones still look bright when tilted and not go dark?

 

[rockhoundofficiando]

Hi all,

My upgrade just arrived, and I love it already. It has great sparkle in most situations. But I’ve noticed that it goes dead in the center when tilted. This never happened with my old stone so I’m wondering what’s up. I attached a picture that seems to capture the effect.

It already bugs you, it would bother me as well. I would return and try again.