Pyramids amplify and then tightly focus energy through the apex. This Jet pyramid can be used to draw off negative energy and blockage from the Root Chakra. An imbalanced Root (Base) chakra can manifest as a build up of strong emotions, denial of these emotions, anger, selfishness, or lack of emotional responses that are necessary for personal survival.
A pyramid is also used to enhance and focus the inherent properties of the stone:
Jet protects and purifies.
Jet neutralizes negative energies. Hold a piece of jet to clear negative vibrations.