Black obsidian is a protective stone that shields against negative energy and puts away all the negativity. It is rooted in the base chakras and has a strong connection to the earth.
 
Healing Properties-
Ability to cleanse and shield from negativity.
Protects you from the darkness that lingers around every corner.
It can attract money and rights for the wearer.
Powerful cleanser of psychic smog created within your aura
It is a strong psychic protection stone