Where does your OEC sit on ‘the chart’?

[Rfisher]

This was brought up in another thread and I think it’ll be curious to see where the various ‘looks’ of our stones are spread out over the chart.
and hopefully others contribute their own stones too, so -

* For entertainment purposes only *
As the range is broad in beauty, which in turn beauty is in the eye of the beholder. And we know you can’t just go by the numbers as it’s an incomplete story.

 

[emmiesweetie]

Interesting question. How would I find that info? I have an OEC for my ering, but very little info on it.

 

[Rfisher]

Interesting question. How would I find that info? I have an OEC for my ering, but very little info on it.

My lab reports had the information

 

[emmiesweetie]

I see. My engagement ring is from a vintage & estate jewelry shop and we got it in 2003... it came with an appraisal but not very detailed so I guess I won't have that info on hand. But I'm very curious! The stone is super beautiful.

 

[Dreamer_D]

No clue because I don’t have pavilion and crown angles for any of my diamonds.

 

[Pomelo]

@Rfisher please can you post a clean (non-marked) version of the table? I’ll play but don’t want to mark over your red highlights!

 

[Rfisher]

@Rfisher please can you post a clean (non-marked) version of the table? I’ll play but don’t want to mark over your red highlights!

Screening chart for Old European Cut diamonds

The visual appearance of “Excellent to Very Good cut quality” old European cut diamonds have the effect of returning sufficient light to somewhat equate them to Modern Cut Class 1-2 […]

www.pricescope.com

 

[Pomelo]

Here are mine, although I don’t have the crown / pavilion info either from my GIA reports. Which lab did you use @Rfisher ?

Two-stone ring is the 3.48ct and Georgian collet is 3.77ct. Individual threads on both with more in-depth pictures, I’ve attached the comparison photos below (no glamour shots sadly - only when I went to the vault!).

I do notice that the 3.77ct is a bit dull under the table (it’s a very shallow stone) but overall I’m quite happy with it! I find I reach for this solitaire more nowadays, maybe because I’m now more used to the finger real-estate of the thick bezel

 

[Rfisher]

Which lab did you use @Rfisher ?

They came with EGL reports from the vendor, OWD.

 

[Lookinagain]

Here's mine. Cert is from 2013 and calls it a Round Brilliant.

 

[Dreamer_D]

Here's mine. Cert is from 2013 and calls it a Round Brilliant.

I think this illustrates something I have thought about this chart for a while, which is that it prioritizes a version of "optics" that aligns with modern rounds. So here we have an old cut that closely aligns with MRB proportions, enough that GIA called it one (no shade, I have one too and love it) and it has proportions in the Excellent category across the board.

Based on using ye old eyeballs, aside from transitionals that do satisfy this chart, my favourite OECs fall in the "Good" category. I would say they are Excellent!

 

[Lookinagain]

I think this illustrates something I have thought about this chart for a while, which is that it prioritizes a version of "optics" that aligns with modern rounds. So here we have an old cut that closely aligns with MRB proportions, enough that GIA called it one (no shade, I have one too and love it) and it has proportions in the Excellent category across the board.

Based on using ye old eyeballs, aside from transitionals that do satisfy this chart, my favourite OECs fall in the "Good" category. I would say they are Excellent!

There is also this chart that I had at one point found on the GIA website. Mine would fall into the Circular Brilliant designation. I know originally GIA didn't have all three of these designations but I don't know when they came up with them. Since my cert is from 2013 it's possible it was issued before this was done. I just can't find anything that tells me what year that was.

 

[Dreamer_D]

There is also this chart that I had at one point found on the GIA website. Mine would fall into the Circular Brilliant designation. I know originally GIA didn't have all three of these designations but I don't know when they came up with them. Since my cert is from 2013 it's possible it was issued before this was done. I just can't find anything that tells me what year that was.

Mine would still be an RB per this chart. So random to focus on culet and star length!

 

[oldminer]

The chart is one I created decades ago. It has limited validity and does look to the cutting of Tolkowsky for guidance. However, you buy an old cut that YOU really like the looks of. You don't buy it from a chart. The point of old cuts was that a craftsman made the financial decisions along with those which have an effect on overall beauty. Old stones are usually a compromise. No one was searching for an ideal-cut in those times. The chart may help you screen out problematic faults, but it is not meant to tell you what you should select. If you don't like the looks of it, you don't buy it. Hope this sets the reasoning behnd the creation of the chart in a more reasonable perspective.

 

[lulu_ma]

This is such a fun idea! The results gel with my belief that MM is late OEC.





These stats are for the center stone of my mom's three stone ring. She's classified as an OEC so I don't have the angles, unfortunately.

 

[EllieTO]

I almost forgot to add Summer Dream! GIA classified it as Old European Brilliant (2024), so it only has table and depth %.

1.49 J SI1
Table 51%
Depth 62.0%
Symmetry Fair
Culet Large

GIA cert








Videos are better than the pics

https://imgur.com/a/cUMiBbF