Translucent emission material - CYCLES

Hey guys,

I’ve been working on a magic gem design, but I can’t figure out how to make my gem glow. I’m looking for a kind of translucent emission material.
Here’s the effect I’m looking for.

See the green light shafts and glints?
Here’s what I’ve got so far.

I’ve circled my relative success in red. I can’t seem strengthen these rays though.
Also, don’t be too critical on the general quality, I got a potato PC ;).
Any pointers would be cool. I have no idea what I’ve done to get what I have so don’t ask for my settings. :o
All I know is that I’m using CYCLES renderer.