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Definition of Eye Clean??

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Well, my definition of eye-clean is no visible inclusions at any angle, at any distance, not even after hours and hours of staring at the stone. My SI stone meets my definition of eye-clean but then I can''t find any inclusions even with the loupe and could barely see them in the loose stone. I don''t know if mine is a particularly clean SI1 but I certainly have seen SI1 stones where inclusions were aparent on close examination.
 
A true "eye clean" stone is one examined, face-up, by an expert grader who cannot see any inclusions or cloudiness without resorting to a magnifier. This does not include viewing a diamond at "any angle", but only face-up. Most SI2 diamonds are not totally eye clean and could be sold between dealers as "eye-cleanish". Consumers might not see this level of inclsuion with untrained eyes, but we are talking about definitions, not the quality of your personal vision.

I have seen quite visibly imperfect diamonds that were prettier and better for beauty than some eye-clean stones that were not especially pretty. The consumer needs to know, understand and look for themselves. We can guide you, but the choice should be the consumer''s selection in nearly all cases.
 
Date: 5/15/2005 12:15:09 PM
Author: oldminer
A true 'eye clean' stone is one examined, face-up, by an expert grader who cannot see any inclusions or cloudiness without resorting to a magnifier. This does not include viewing a diamond at 'any angle', but only face-up. Most SI2 diamonds are not totally eye clean and could be sold between dealers as 'eye-cleanish'. Consumers might not see this level of inclsuion with untrained eyes, but we are talking about definitions, not the quality of your personal vision.
Regarding 'eye clean,' the type of lighting, the eyesight of the grader and the distance at which the diamond is viewed will all make a difference when splitting hairs (as we are in this thread). If the expert grader is farsighted, aged 60 he/she cannot possibly make the distinctions a nearsighted grader, age 25 can. For more insight into the mind of the 'miner'
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can you provide your opinion on lighting, vision and distance differences as well?

I have seen quite visibly imperfect diamonds that were prettier and better for beauty than some eye-clean stones that were not especially pretty. The consumer needs to know, understand and look for themselves. We can guide you, but the choice should be the consumer's selection in nearly all cases.
Excellent.
 
Date: 5/15/2005 12:15:09 PM
Author: oldminer
A true ''eye clean'' stone is one examined, face-up, by an expert grader who cannot see any inclusions or cloudiness without resorting to a magnifier. This does not include viewing a diamond at ''any angle'', but only face-up. Most SI2 diamonds are not totally eye clean and could be sold between dealers as ''eye-cleanish''. Consumers might not see this level of inclsuion with untrained eyes, but we are talking about definitions, not the quality of your personal vision.

Yes, that''s a good techinical definition, but as Rhino said, the most important definition is the one the purchaser has. That''s why I always specify exactly what I mean when I ask. Typical industry definition or elepri''s of close sustained inspection at any angle including face down and including dark background (darkfield).

I also think that vendors should make it a practice of asking what the customer means when he/she asks "is the stone eye-clean". It''s good to clarify up front to avoid any misunderstandings or disappointments. No one wants to return or receive a returned stone. I would say no one has ever asked me what I meant when I asked "is the stone eye clean?" I had to specify close inspection or normal trade definition.
 
I know, my very subjective definition of eye-clean was not in any way meant to imply that it was or should be the industry standard. Rather, this is what I think of when I think of an eye-clean stone. When we were shopping for my engagement ring, I knew to specify that I was looking for a stone that met my own eye-clean standards, which was certainly not every SI1 stone or even every SI1 that's considered eye-clean by the trade definition.
 
Date: 5/15/2005 1:46:13 PM
Author: noobie

I also think that vendors should make it a practice of asking what the customer means when he/she asks 'is the stone eye-clean'. It's good to clarify up front to avoid any misunderstandings or disappointments.

Yeah... especially since magnified clarity plots and pictures do next to nothing to show where "eye clean" stops. Reflecting inclusions have a good chance to look allot worse in a photo than in real life. More often than not it takes a very precise, narrow range of angles to get reflections - so narrow that it is very hard to hold stone & observer still and focused on just that image in real life. Of course, the snapshot of the camera does that naturally and that's enough to show the diamond at it's unrealistic worst.

GOG and NiceIce note inclusions and "reflections" on their clarity snapshots. WF does not, for now.

Of course, the easy way out is to avoind taking detailed pictures
9.gif
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Picture wouldn''t upload into the previous post. This was meant as an example of reflections inside a diamond.

Can you believe that clarity plot actually describes the same stone as the picture !

SpecMirror.JPG
 
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