From what I have noticed over the last 12 years when collecting granites is that most all of them do have the crazy granity/spotted pattern all over their bodies.....not just a couple flecks here and there..........They also have a different coloration to them.........some are a deep orange/brown.....some seem to have reddish hues.......but they are just brighter than normal.........now some also have a gold stripe down their backs......but not all of them.....
A true granite does however have one to multiple black spots right behind the head..... look at the pic for an example.
Now just beacuse your snake has a spot behind its head does not make it a granite unless it has all the other characteristics.....and I am not saying that everyone with a snake that appears to be a granite because it has all this stuff will prove out to be genetic.....
here are a couple other pics of the 2 girls........
they are both very stubborn so I will try to you all some good head shots later today.....
Jared H