Already made this suggestion, but it should be possible to leave a teleporter pyramid on the ground and use it to teleport to your partner. It's not all that useful being forced to take it with you with you teleport, it cuts out half the utility of the thing.
Additionally, if you do leave them somewhere, maybe the location of the stones should also appear on the map so you can find out where they are. (Possibly with an option to turn the marker off if you really don't want it.)
Haven't gotten them yet in the current build but in the previous one you could leave it on the ground and walk for a little while before it was returned to your pocket. I was able to place it at the end of the bridge in Black Cove and go all the way to the crab without it being put back into inventory.
