Obsidian is the stone of protection; it is an excellent grounding stone, shields against negativity, transforming negative vibrations within an environment. Obsidian is created when lava cools rapidly. Obsidian has been used for arrowheads and knifes, and will bring out your inner “warrior.” Obsidian protects one from physical and emotional harm. It can also protect you from negative energy, as well as assist you in letting go of grievances, which have been held against another.