Black Obsidian Arrowheads. Black Obsidian is a natural volcanic glass formed from molten lava that cools very rapidly. It is made of 70-75% SiO2+25-30% MgO and Fe3O4 and its Hardness (Mohs) is 5-5.5 Native Americans have long believed that wearing a hand-carved Obsidian Arrowhead, as a talisman around your neck, was a symbol of protection, courage, and strength. They also believed that the arrowhead protected them from illness and acted as a guard against the Evil Eye. It would deflect any negative energy, protect them from their enemies and absorb their power. Black Obsidian is a grounding stone that provides an instant connection to the Root Chakra. Black Obsidian assists in releasing those emotions that cause negative energy such as anger, jealousy, greed, resentment, etc. Once these energies are removed, Black Obsidian will help to keep the space protected. Wear Black Obsidian Arrowheads to remove any unwanted negative energies and to keep you free of negativity.