Silver Sheen Obsidian. Obsidian is a glassy, silica-rich volcanic rock with a hardness of 5 to 5.5. It is an amorphous stone, meaning that it's structure contains no regular geometric pattern. The name Obsidian is derived from the name of the prominent ancient Roman, Obsius. Fen Shui Element: Earth; Metaphysical attributes: Psychic protection, grounding, cleansing of negativity and spirit communication.
Approximate measurements: 22 inches tall by 18 inches wide by 5 inches deep.