Date: 3/17/2009 3:19:08 PM
Author: venus
Yes, well, it''s common knowlege that it''s undesirable and affects the value or desirebaility of a stone. I was actualy hoping for more technical or indepth information about what causes it from someone knowlegeble about cuts.....No, I do''t own such a stone but I''d like to inform myself about this....and as much about diamond cuts as possible....
HI Venus,
Let''s simplify it- not that anyone is not capable of grasping the concept- but there can be other causes:
Generally a "Fish Eye" occurs when a diamond is cut too shallow.
What happens is that the girdle reflects into the table, forming a ring.
The effect is reminiscent of a fishes eye.
As Paul mentioned, such a stone would be quite difficult to sell.
Such a stone would not need to be judged by an expert, any sighted person would easily see the problem..
My feeling is that a true distinct "Fish Eye" is what can be called an "off make". This is a distinct difference form the subtle differences often discussed here. For example: variations within the GIA EX Cut grade. The "worst" of such stones is not going to be considered "off make"