Fake GIA inscriptions

[stone-cold11]

Date: 10/7/2009 12:07:37 PM
Author: yoshu
So with GIA excellent cut and excellent HCA scores, would it make a visible difference if we took the idealscope/ASET image out and compared. Or will the stones be pretty much brilliant and shining as far as the naked eye can see??

err.. compared with what?

 

[yoshu]

So basically 2 GIA excellents with low HCA scores. With the ideascope analysis and by looking with naked eyes, will they be visually very different??

 

[stone-cold11]

Still depends on the actual cutting.

For example, if the symm is off, one being a H&A, the other totally mess up symm, it will be obvious, some prefer the nice pattern while others prefer a splintery one.

Also depends on the crown and pavilion angles, a shallow crown angle, large pavilion angle cut will tend to be brighter than a larger crown angle, smaller pavilion angle cut stone.

Also, a larger lower half number will result in a thinner arrow look for the stone while a smaller lower half number will have a thicker arrow look, for a VG optical symm stone.

 

[yoshu]

Very daunting, diamond hunting is.

Thanks for the info!