Serves as a crystal do not disturb sign. It is a strongly protective stone, forming a shield against negativity, provides grounding cord from the base chakra to the center of the earth. It absorbs negative energies from the environment, blocks psychic attacks and removes negative spiritual influences. It effectively shuts off the outside world influences so one may concentrate and focus on the situation at hand. It may protect one from discovery during secretive activities or may act as crystal camouflage energetically cloaking one's
thoughts and feelings.