A Magnet should tell you if it's a Nickel-Iron (most easily found)
Most meteorite are Chondrites which are stoney meteorites
The surface colour doesn't indicate much as I have both Chondrites and Nickel-Irons with black crust
You'll need to slice it to find out more
If it's a piece on Moon expect about $5000- US per gram
Unfortunately it is illegal to export Australian found meteorites without a special export permit.
Still you are holding a piece of the Heavens!
Enjoy
