Since everyone's got dragons on the brain right now (what with Draconomicon 2 coming out soon), I just have to say...
I have always hated the very concept of the "gem dragons." I hated them then, I still hate them now. I'm thrilled that, of all the dragon types mentioned in Monster Manual, gem dragons are not among them, and I hope they remain utterly absent from 4E.
So there. 
