Here is a really interesting brown diamond. In this case, GIA didn't identify anything other than J color.
The pink I see is so very faint - sometimes the stone just looks white.
GIA noted internal graining - and you can see that in the pictures.
However based on the way it's cut - just like a Faint Pink - you get a total sparkle sort of light performance.
That means you can't see the graining in person. Also no bowtie whatsoever.