#OB-80D Natural rough Black Obsidian, 0.75-0.84 pound in weight. Each one unique. In limited quantity. Caution: natural rough obsidian can have extremely sharp edges. Handle with care. Not for children.
Chemical Composition: an Igneous Silica (volcanic glass)
Hardness: 6-7 Occurence: Obsidian occurs in volcanic lava flows, from silica-rich magma that has come to the surface.
Metaphysical Properties: Excellent for grounding and protection. Obsidian wards off negativity. Useful for introspection - helps one to see where changes need to be made within oneself. Corresponding Astrological Sign: Sagittarius Chakra: 1st - Root chakra