Points, Towers and Wands
Points or Towers are generally a polished crystal with 6 or 8 sides and a flat base to stand the crystal. The energy of a point or tower is directed up and out. They emit a directional energy affecting the space they reside as well as any other crystals that are nearby.
A Generator has six faces terminating in a single point - often without a flat base for standing up.
Wands can be single or double-terminated (points at both ends of the stone)
Wands allow for energy to flow and be directed, their long shape allows for energy to travel up and down as well as in and out. They can be helpful for releasing negative energy or bringing in healing energy.