Emeralds have bigger teeth too! I can't believe no one pointed that out!

You can find chondro care sheets every where but a good emerald one is hard to come by.

http://www.kingsnake.com/emeralds/

I will admit, I did not read it all but it seems like pretty ligit information.
Emeralds are the only ones (so far) that can be born green (really rare) and just grow up without changing.