What stone makes abra evolve?(pokemon emerald)?

No stones, nada!!!!!! You have to train and train cause it evolves at a certain level into a Kadabra, then you trade your Kadabra for a Alakazam...I checked before, and I have evolved my Abra at the 20's...and I checked in a Pokemon Book...Trust me, train and you'll get what you really want! I play Pokemon too, but a different version, Gaz plays Game Slave so she doesn't know the answer! LOL!