you need to mine the whole meteor away which consists of several layers. the outer layer is the hardest and you'll be needing 70 mining for it (at least in our case, but i guess that will be standard). after each layer the mining requirements are lowered.
the meteor gives decent mining experience and depending on the amount of "star dust" you mine (max.=200) you'll get a reward from the little sprite that's trapped in the meteor. the sprite is freed when you mined the whole meteor away.
my reward for 168 stardust:
- 42k
- 44 astral runes
- 128 cosmic runes
-16 gold ore
you can only mine a meteor once a day.

