BLACK OBSIDIAN (The Stone of Truth) helps to protect the very sensitive against depression. It is the stone of the soft hearted and gentle people of the world. Use obsidian to help block negativity of any kind. As a black gemstone, it symbolizes self-control and resilience. Black stones have protective energies in the sense that black is the absence of light, and therefore, can be used to create invisibility. Black obsidian has the aura of absolute mystery. Its energy draws you in softly, but very deeply, which makes the presence of black obsidian powerful in many ways.