ET/extra-terminated quartz crystals have a single termination at one end and several at the other. The additional terminations are incorrectly referred to as extraterrestrial.

ETs are emitters of the Universal Life Force, like all quartz crystals. But they are special emitters.

These are "beam splitters".

The additional terminations absorb the universal life force energy from their single termination, amplify it, divide it, and diffuse it from the multiple terminations located at its opposite end. ETs are healing crystals when large areas of imbalance need to be corrected. They are excellent crystals for providing strength when multiple needs all require attention.