Polished black tourmaline is believed to possess various healing properties, primarily focused on protection, grounding, and purification across physical, emotional, and spiritual levels.
 
Here's a breakdown of these purported properties:
1. Physical Healing:
Detoxification: Believed to aid in eliminating toxins and pollutants from the body.
Pain Relief: Some believe it can help alleviate pain, particularly muscle tension and joint stiffness.
Immune System Support: It's thought to strengthen the immune system.
Improved Circulation: May help improve blood flow and circulation.
Protection from EMFs: Black tourmaline is considered by some to offer protection against electromagnetic fields (EMFs) emitted by electronic devices. 
2. Emotional Healing:
Stress and Anxiety Relief: Black tourmaline is often used to help relieve stress, anxiety, and promote a sense of calm.
Emotional Grounding: It is thought to help ground emotions and provide a sense of stability during challenging times.
Dispelling Negativity: Believed to help dispel negative energy, thoughts, and emotions.
Promoting Positive Attitudes: Some believe it can foster a more positive outlook and mindset.
Enhancing Inner Strength: It's associated with building inner strength, courage, and self-confidence. 
3. Spiritual Healing:
Grounding: Black tourmaline is primarily known as a powerful grounding stone, connecting individuals to the Earth's energy.
Protection: It's believed to offer protection against negative energies, psychic attacks, and unwanted influences.
Aura Cleansing: Some use it to cleanse and purify the aura, removing blockages and negative energies.
Chakra Balancing: Black tourmaline is strongly associated with the root chakra, which is located at the base of the spine and governs feelings of safety and security.
Spiritual Connection: It is thought to enhance the connection between the physical and spiritual realms.