Obsidian Stone Generator. Black Obsidian Stone is a powerful cleanser of psychic smog created within your aura, and is a strong psychic protection stone. It has powerful metaphysical properties that will shield you against negativity, and the energy of these stones may stimulate the gift of prophecy.lack Obsidian Stone is excellent used in combination with a number of different stones. To boost the psychic protection aspect of other stones,. you may choose to use them with other strongly protective stones to elevate the level of protection.