Black Obsidian Point

The volcanic glass rock of Obsidian is often associated with mystery and a powerful grounding and absorbing rock. Known as a "psychic vacuum cleaner," it's used as a sword against negative energy in your auric field and environment, and seen as a symbol that the darkness could be pierced to reveal the white light of the truth. 
It has often been used as a portal to connect to the spiritual world and facilitate communication with the other side.