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What you think about these surface marks, can they be polished out, it's vivid yellow!

ferropericlase

Rough_Rock
Joined
Mar 27, 2025
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3
Hi to all forum members. peculiar markings on these 2 diamonds, wondering whether I can polish away marks on the table, the other has a grain string that is being reflected across the face of the stone
if you zoom in, you'll see the marks which are transparent to translucent. some conglomerate material present as well, not sure what they are, resembles a transparent eclogite?
Can never seem to bring out the yellow, in the pictures, with daylight bulb. any advice well appreciated!
 

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i like 'em - you have some nice natural geology there - i would leave as is.

if you want a "boring" clean Yellow just buy a lab/synthetic....
 
Hi to all forum members. peculiar markings on these 2 diamonds, wondering whether I can polish away marks on the table, the other has a grain string that is being reflected across the face of the stone
if you zoom in, you'll see the marks which are transparent to translucent. some conglomerate material present as well, not sure what they are, resembles a transparent eclogite?
...

You can only polish away things that are at the surface.
It's possible, perhaps likely, that some, most or all of that gunk is deep inside the diamond where the polishing wheel can't reach.

A jeweler's loupe can be used to learn where the gunk is in, or on, the diamond.
I try to keep the distance from my eye to the loupe constant since it's easier to control focus when fewer things are moving.

Hold the loupe close to your eyelashes.

59.png

Now slowly adjust the distance from the gem to the loupe until the gem's table comes into focus.
Likely only some of that gunk will be in focus.
Notice the gunk there.
This may take some practice.


Next move the diamond closer to the loupe.
The gunk that was in focus at the table will go out of focus and any gunk that is deeper inside the diamond will come into focus.
If so polishing the table would not remove the gunk inside the diamond.

Polishing a gem means removing some of the gem material itself.
Since diamond is the hardest gem material, you need to have a polishing wheel covered with diamond material (diamond dust?) to polish a diamond.
Do you really have that?

Good luck.
 
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i like 'em - you have some nice natural geology there - i would leave as is.

if you want a "boring" clean Yellow just buy a lab/synthetic....

I hear what you say. I saw the GIA official literature on these stones, you might be interested in, I appreciate the GIA for the help they give us in understanding the natural processes that go on within the interior of the earth. I'll put some more pictures up later. Thank you, have a good time.

 
You can only polish away things that are at the surface.
It's possible, perhaps likely, that some, most or all of that gunk is deep inside the diamond where the polishing wheel can't reach.

A jeweler's loupe can be used to learn where the gunk is in, or on, the diamond.
I try to keep the distance from my eye to the loupe constant since it's easier to control focus when fewer things are moving.

Hold the loupe close to your eyelashes.

59.png

Now slowly adjust the distance from the gem to the loupe until the gem's table comes into focus.
Likely only some of that gunk will be in focus.
Notice the gunk there.
This may take some practice.


Next move the diamond closer to the loupe.
The gunk that was in focus at the table will go out of focus and any gunk that is deeper inside the diamond will come into focus.
If so polishing the table would not remove the gunk inside the diamond.

Polishing a gem means removing some of the gem material itself.
Since diamond is the hardest gem material, you need to have a polishing wheel covered with diamond material (diamond dust?) to polish a diamond.
Do you really have that?

Good luck.

Hi, good day to you, I tried looking at it through the loupe, and it was very difficult to see hardly anything,

There's an obvious clarity difference between the 2, which made me keep on looking, very slight haze on the flawed piece, but massive amounts of sparkle ( rainbow triangles, under polarised light) That's why I decided to run the camera setup. There's amounts of green & some brown stains inside. I'll get around to showing you at some point.

Interesting picture of 1 of the stone in non polarised light, Thank you & have a good time.

thumbnail (9) (2).jpgthumbnail (9) (2).jpg
 
Hi, good day to you, I tried looking at it through the loupe, and it was very difficult to see hardly anything,

There's an obvious clarity difference between the 2, which made me keep on looking, very slight haze on the flawed piece, but massive amounts of sparkle ( rainbow triangles, under polarised light) That's why I decided to run the camera setup. There's amounts of green & some brown stains inside. I'll get around to showing you at some point.

Interesting picture of 1 of the stone in non polarised light, Thank you & have a good time.

thumbnail (9) (2).jpgthumbnail (9) (2).jpg

It almost looks like moissanite to me
 
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