Can’t find the focusing crystal in Skyrim?
I searched and searched… I looked at all of the Falmers and they did not have it. Here’s a workaround. Go to the console. (Only available in the PC version. Google it if you don’t know what this means.)
At the console do:
This will add the crystal to your inventory. Now, to get Paratus Decimius to take you to the machine (and not just say to you repeatedly, “there’s no use talking unless you find the crystal”), do the following:
setstage mg06 40
You’ll want to do this inside the aerodome. Hope this helps someone else get unstuck like it did for me.