Obsidian is a Volcanic Stone (technically, glass) formed of cooled Lava; it does not grow in the way Crystals do. It is over 70% silicon dioxide, making it energetically similar to Quartz in some ways. However it also has Strong Alchemical Fire Energy which combines with its energy absorbing capacity to help protect People and Locations from Detrimental Energies.
Obsidian acts as a virtual Energetic “Black Hole” to absorb large amounts of highly detrimental energies.
Obsidian holds instructions extremely well; it can be used as to absorb detrimental energies present in the environment or which are directed at a person (ie, it can be used as a “Diversionary Target.”) For novices, reinforce this programming on a weekly basis.