Internal Grain lines?

[MelanieC]

I tried to do some searching on internal grain lines- Mostly I found information on external grain lines.

If a diamond say''s internal grain lines- how bad is that? Does it hurt the diamond, and is it going to be visible with the eye?

Thanks in advance

 

[Froof]

Take a look at this page:

http://www.niceice.com/diamond_clarity_characteristics.htm

The second to last section has some information on internal graining (pictures too!).