Black Obsidian Obsidian is truth-enhancing. A strongly protective stone, it forms a shield against negativity. It blocks psychic attack and absorbs negative energies from the environment. Obsidian draws out mental stress and tension. It stimulates growth on all levels, urging exploration of the unknown and opening new horizons. Brings clarity to the mind and clears confusion. Helps you to know who you truly are. Obsidian dissolves emotional blockages and ancient traumas. Promotes qualities of compassion and strength.