Obsidian is a gemstone without boundaries or limitations. It impels us to grow and lends solid support as we do. It provides grounding, absorbing negative energies from one's environment. Placing obsidian under the pillow can draw out mental stress and tension. It also urges you to confront the reason causing problem all together. This crystals greatest gift is insight into the cause of problems, diseases. It alleviates pain and helps with blood circulation.