Likely to be one of the most highly prized materials in the world, Aetherflux allows the creation of teleportation circles. A dose of 0.02 lbs is worth 50 gp and allows you to create a temporary teleportation circle.
For a permanent teleportation circle you need about 8lbs of Aetherflux, 20.000 gp worth. And it must be renewed each year with 4lbs, 10.000 gp.