brown graining

[pyramid]

If brown graining is see around a feather does this mean the feather is a natural inclusion, if a diamond has breakage it would not develop brown graining would it after it has grown?

 

[pyramid]

As grain is a growth phenomena I believe it could not change colour after growth, so I have probably answered my own question. Can anyone confirm this?

 

[RockDoc]

Look at the graining with crossed polarized filters.

You could be seeing strain, or just shadowing.

Rockdoc

 

[pyramid]

It may be shadowing. Grain cannot change colour after the diamond is formed though can it? I can see this with a loupe. Don''t have access to crossed polarised filters at the moment but no worry as it is an old very small diamond.

 

[pyramid]

Can grain change colour after the diamond is formed due to damage?

 

[RockDoc]

Date: 4/7/2007 10:04:40 PM
Author: Pyramid


Can grain change colour after the diamond is formed due to damage?

The color grade is determined by what the grader sees. If the brown graining shows, then yes - it did affect the conclusion for the color grade.

Are you assuming that brown graining or shadowning is damage? It isn''t in most cases.

Rockdoc

 

[pyramid]

Thanks RockDoc. Yes I was wondering if when a diamond got damaged if brown graining could materialize?