Teleport down to that teleporter and you should be able to pick it up again (drop and use the other teleporter pyramid if you have it with you, or head back to your home base, or wherever you left it, and use it from there).
Telekinesis is handy, but it triggers the default action of an object; loot it will pick up, the teleporter stones (and levers, etc) it will try to use.
If you can not otherwise get the teleporter stone back, it is possible to get a replacement set (see the topic
Lost Items - guide and directory of inventory files).
Alternately, if you are close to finishing the council quests, you can go without until you are done everything, and continue the main plot. That will move you to a new location, and you will get replacement teleporters there.