Obsidian is one of the most frequently used stones by which to scry visions and receive multi-dimensional information. Obsidian is born of the fires of the planet further lending deep regenerative and creative power from the very core of Gaia. It can assist us to burn off that which does not serve us, that which is an illusion, that which does not add to the true nature of our being. It surrounds us in the vast, expansive, and unfathomable presence of the Cosmic Mother who is both frighteningly fierce and endlessly nurturing.
There are several forms of obsidian, such as black obsidian, Apache tears, snowflake obsidian, rainbow obsidian, mahogany obsidian, and the "sheen" obsidians in gold and silver. Black obsidian is the most appropriate for scrying purposes, apache tears are good for grief work, snowflake obsidian is helpful with breaking habitual patterns, rainbow obsidian is shadow transformative, mahogany obsidian is great for removing extreme negativity, and the sheen obsidians for flashes of insight and intuition.
Obsidian plays well with: Salt Other black stones (shungite, jet, back tourmaline, etc) Red stones "Fire" stones (created by intense heat) Moldavite (both are natural glass) Tektite (ditto) Pumice