[quote=@Metronome]
Accepted!

Quick question though. Can he infect other people with the crystals?
[/quote]

If you get hit with a crystal, it will slowly begin to grow. It can take upwards of 24 hours to grow over an adult human being. More beyond that for it to kill them. (Very painful.) But, he can easily remove the crystal from those infected. 
As for if he can turn regular humans into strange crystal alien things like himself? I haven't thought about that, but for now I'd say no. 
Also, if infected, lighting a match and burning the infected area is a good way to solve the problem. As mentioned before, it's adverse to heat.