Cleaning out a library and found these with pieces from several dozen board games. I'm not 100% sure they even go to a game.
The symbols don't look like alchemical or occult symbols I'm familiar with.
If you find a 7th one and you use them in the correct order, I think a wormhole will appear. It's probably near some supercapacitor.
That, or if you figure out the correct sequence, 2 people from the Air Force are going to show up and offer you a job you can't refuse.