Mohs scale: 7–7.5

Spiritual uses: Black tourmaline is good at grounding your spiritual practice into your everyday life. With this stone in hand, delve into the deeper aspects of your consciousness to uncover past lives. This stone also deflects negative energy.

Mental uses: Black tourmaline is helpful when you are feeling scattered and constantly being pulled off center. Use it to help you remain focused on the task at hand. Let it clear away repetitive, outdated thoughts so that you can continue to achieve your goals and aspirations. This stone helps shield you from the effects of jealousy, yours and others.

Emotional uses: Black tourmaline helps to draw out dark negative emotions holding you back from living a happy life. This stone is useful when you find yourself reacting uncontrollably. This stone helps you uncover the deeper hidden reason for negative actions or reactions toward others.

Physical uses: Black tourmaline offers protection from electromagnetic frequencies emitted by cell phones, computers, and other electronic devices.