The Crystal Axis was created on 2010-05-28.
I believe the answer would be the crystal system, but the crystal system is based on the angles and length of the axis of the crystal. The axis length and the angle at which they meet would affact the number and angle of the crystal faces.
In the rotating crystal method, a single crystal is mounted with an axis normal to a monochromatic x-ray beam.
Crystal Caves was created in 1991.
Axis Bank was created in 1994.
Axis Mutatis was created in 1995.
The Beijing Axis was created in 2002.
The Axis of Perdition was created in 2002.
Axis Communications was created in 1984.
Exploring the Axis was created in 1985.
Discordance Axis was created in 1992.
Axis Amerika was created in 1987.
Axis of Evol was created in 2005.