if you are looking for your own stone they can be found here... as to where they are when they are not in their own maps, I'm still looking for that myself x.x
http://www.aeriagames.com/forums/en/viewtopic.php?t=510946
IGN Redemption Jinong IGN: Mitsuhide G12 and searching for cheap ls5v1 or ls4v1 (or v2 if low% or cheap, kinda extremely broke guild: LegionFuries (agm)