Diamond Symmetry

[WrinklyBulldogs]

In the pictures below, the arrows in the images seem of different lengths (the ones on the bottom appear shorter). Also the table is 58% (GIA) but it appears larger in the images.

Is this due to the stone’s symmetry?

 

[yssie]

The arrowshaft length difference that you're asking about is because the stone's girdle plane was not parallel to the plane of the camera lens during photography - the stone was tilted a bit.
The stone certainly also lacks exceptional optical symmetry.

 

[WrinklyBulldogs]

When you say that the stone also lacks exceptional optical symmetry is that because it was not aligned properly before being photographed or something else that you are noticing aside from that fact?

 

[WrinklyBulldogs]

The arrowshaft length difference that you're asking about is because the stone's girdle plane was not parallel to the plane of the camera lens during photography - the stone was tilted a bit.
The stone certainly also lacks exceptional optical symmetry.

When you say that the stone also lacks exceptional optical symmetry is that because it was not aligned properly before being photographed or something else that you are noticing aside from that fact?

 

[yssie]

When you say that the stone also lacks exceptional optical symmetry is that because it was not aligned properly before being photographed or something else that you are noticing aside from that fact?

If a stone has excellent optical symmetry but was photographed at a tilt, all deviations will be symmetric about the axis of tilt.

This stone shows deviations that a tilt axis does not account for.

 

[yssie]

This is the axis of tilt:

 

[WrinklyBulldogs]

This is the axis of tilt:

If a stone has excellent optical symmetry but was photographed at a tilt, all deviations will be symmetric about the axis of tilt.

This stone shows deviations that a tilt axis does not account for.

Thanks so much for the explanation! I knew something was off but could not pinpoint what it was.

How would this lack of symmetry show up in the real-life viewing of the diamond and diamond performance? Since the Idealscope shows no light leakage would the lack of optical symmetry be an issue with it’s real-life performance?

 

[Karl_K]

The OS is reasonable should be fine if not seaking an H&A stone.

 

[WrinklyBulldogs]

The OS is reasonable should be fine if not seaking an H&A stone.

Thanks Karl_K, it is being represented as a H&A cut. So it is an issue from that standpoint.

 

[Karl_K]

Thanks Karl_K, it is being represented as a H&A cut. So it is an issue from that standpoint.

hearts image?

 

[diamondseeker2006]

If it's not from one of the superideal cut vendors, it's not what we would call a "hearts and arrows" stone. It is an excellent cut stone from what we can see. But it is likely not a perfect hearts and arrows cut. That said, the hearts images would be needed to really verify that as Karl has requested.

 

[WrinklyBulldogs]

hearts image?

I will get the image and post it. Thanks again for your

 

[WrinklyBulldogs]

If it's not from one of the superideal cut vendors, it's not what we would call a "hearts and arrows" stone. It is an excellent cut stone from what we can see. But it is likely not a perfect hearts and arrows cut. That said, the hearts images would be needed to really verify that as Karl has requested.

Thanks so much, I will get the images and post them.

 

[WrinklyBulldogs]

hearts image?

Here are both the Hearts and Arrows images:

 

[Karl_K]

Here are both the Hearts and Arrows images:

There are some issues with how they were taken that makes them look worse but confirmrs not h&a.

 

[free-user]

The hearts and arrow images are all off. Its a good performance diamond just not a good h&a