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Posting here because the vendor says this is a natural stone but ummm… hmmm… Why is there a rainbow blob? Is it a color coating (yuck) or maybe caused by irradiation?

364A1434-4CAC-4B5B-8843-862F605147F4.jpeg
 
I actually have a tumbled citrine that has that sort of rainbow in it!
 
oncrutchesrightnow said:
Posting here because the vendor says this is a natural stone but ummm… hmmm… Why is there a rainbow blob? Is it a color coating (yuck) or maybe caused by irradiation?

364A1434-4CAC-4B5B-8843-862F605147F4.jpeg
Click to expand...

Not a rainbow. It is thin film dispersion caused by a tiny open fracture.
 
Garry H (Cut Nut) said:
Not a rainbow. It is thin film dispersion caused by a tiny open fracture.
Click to expand...

Thanks, Garry!

In case people are interested, here is a link to an article on diamond-like carbon coating.

https://www.gia.edu/gems-gemology/w...e-coated-diamond-film-imitating-rough-diamond

Ok, here’s a few more questions, Since DLC is applied via vapor disposition, and since CVD grows diamonds layer-by-layer, how can we tell whether the film dispersion we are seeing is an open fracture that splits the the layer of the DLC from a different non-diamond material underneath, versus just a split in the layers of legit LGD grown through CVD? Granted according to the article there could be tell-tale inclusions if the underlying material is moissanite. But absent those inclusions… Do we have to resort to x-rays every time?

If the fracture is a break between DLC and some other material, how do they get the DLC such a pretty pink? Do they mix up a batch of DLC and irradiate that?

If the dispersion is not from a break between DLC and a different material, but is in fact dispersion from different layers in a legit CVD diamond, does that mean that with strategically placed minor surface fractures we could create diamonds that look to the human eye to be entirely covered in dispersion “rainbows?”
 
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Here’s another interesting colored stone. well- known vendo
oncrutchesrightnow said:
Thanks, Garry!

In case people are interested, here is a link to an article on diamond-like carbon coating.

https://www.gia.edu/gems-gemology/w...e-coated-diamond-film-imitating-rough-diamond

Ok, here’s a few more questions, Since DLC is applied via vapor disposition, and since CVD grows diamonds layer-by-layer, how can we tell whether the film dispersion we are seeing is an open fracture that splits the the layer of the DLC from a different non-diamond material underneath, versus just a split in the layers of legit LGD grown through CVD? Granted according to the article there could be tell-tale inclusions if the underlying material is moissanite. But absent those inclusions… Do we have to resort to x-rays every time?

If the fracture is a break between DLC and some other material, how do they get the DLC such a pretty pink? Do they mix up a batch of DLC and irradiate that?

If the dispersion is not from a break between DLC and a different material, but is in fact dispersion from different layers in a legit CVD diamond, does that mean that with strategically placed minor surface fractures we could create diamonds that look to the human eye to be entirely covered in dispersion “rainbows?”
Click to expand...

P.S. I found another weird colored diamond. It is from brilliance.com, which is a more mainstream vendor, plus it has an IGI report identifying it as LGD and having possible treatment. So overall it is far less likely to be a fraud. Anyone want to check that one out and speculate how it got it’s weird color?

Not-of-this-Earth specialty-cut grudge match! (I.e. show me your LGD specialty cuts.)

I had 2 come back. The cushion picture placeholder is incorrect, you have to click through to see the diamond. https://www.ritani.com/products/2-09-carat-cushion-lab-diamond-very-good-cut-g-color-vs1-clarity-igi-lg522229791-sku-d-3l21nsrztr...
www.pricescope.com
 
Nice finds, I love the top .43 especially!
 
The GIA inscription on the .54 E Radiant says "Springcut." I've seen this before somewhere but don't know what it means. I'm trying to stop myself from asking for the 360.
 
 
Old PS thread on Spring Cut.

SpringCut diamonds

My intended and I did some looking at engagement rings the other weekend. We saw some Tycoon cut rings and some emerald cut rings and some rounds. She really likes rings with three diamonds, a larger center stone with smaller flanking stones of the same cut. I have been looking at SpringCut...
www.pricescope.com
 
oncrutchesrightnow said:
Old PS thread on Spring Cut.

SpringCut diamonds

My intended and I did some looking at engagement rings the other weekend. We saw some Tycoon cut rings and some emerald cut rings and some rounds. She really likes rings with three diamonds, a larger center stone with smaller flanking stones of the same cut. I have been looking at SpringCut...
www.pricescope.com
Click to expand...

6055DC39-8EEF-428C-B0BE-4387AD781462.jpeg

Always loved this setting but could not figure out what to put in it. Now I have an idea.
 
I just bought this weirdo. Another e-ring in a generic setting.
But it was so spready and weird with a huge culet. Strong flouro...what a funky diamond. Almost flat like a rose cut? 6.84 x 5.21 x 2.64 .70 J

GIA - Report Check

www.gia.edu www.gia.edu

It's okay if you say, "girl, what did you do?"
I'm not sure.

0.70 Carat Oval Diamond GIA 7443151904 | Ritani

0.7 Carat Oval Earth Diamond G Cut J Color SI1 Clarity with diamond report number GIA #7443151904
www.ritani.com www.ritani.com

Screenshot 2023-03-10 202639.png
 
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Ibrakeforpossums said:
You're my hero. Show us the way.
Click to expand...

We can fumble around together, if ya like.

Lord, what did I do?

Who knows if it will be available? The diamond is not showing as unavailable yet. But my order is confirmed. Weird.
 
MMtwo said:
We can fumble around together, if ya like.

Lord, what did I do?

Who knows if it will be available? The diamond is not showing as unavailable yet. But my order is confirmed. Weird.
Click to expand...

Yessssss I love it. So weird and cool
 
lovedogs said:
Yessssss I love it. So weird and cool
Click to expand...

The whole middle should be a window, but it doesn't look like a window.
I guess we'll all find out together. Ha.
 
MMtwo said:
I just bought this weirdo. Another e-ring in a generic setting.
But it was so spready and weird with a huge culet. Strong flouro...what a funky diamond. Almost flat like a rose cut? 6.84 x 5.21 x 2.64 .70 J

GIA - Report Check

www.gia.edu www.gia.edu

It's okay if you say, "girl, what did you do?"
I'm not sure.

0.70 Carat Oval Diamond GIA 7443151904 | Ritani

0.7 Carat Oval Earth Diamond G Cut J Color SI1 Clarity with diamond report number GIA #7443151904
www.ritani.com www.ritani.com

Screenshot 2023-03-10 202639.png
Click to expand...

I'm crazy about it. I love that cut!
 
I am so heartened you all are encouraging on this stone and not gently trying to prepare me to send it back :D.

I got up for a "sleep-break"and checked and the stone is now unavailable.
 
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