Healing Crystals India Tourmaline Pyramid Gemstone Feng Shui Spiritual for Reiki, Aura Cleansing, Chakra Balancing Energy Charged & EMF Protection, 20-25 mm &ndash; Black Black Tourmaline is a protective stone which repels and blocks negative energies and psychic attack. Black Tourmaline also aids in the removal of negative energies within a person or a space promoting inspiration, joy and delight. It reverses the negative radio waves emitted by your cell phone,tv, microwave, computer etc.and all products are shipped in branded packaging of Healing Crystals India. This product includesauthenticity certificate, free 135 pages e-book about crystal healing by abhishekpandit, on request. Return is not accepted after 48 hours of delivery. Size: 20-25 mm. Excellent gemstone to focus on meditation, contemplation and chakra practices and also absorbs radiation while placing near computers and other electronics products. Perfect choice for decorators dream. They use this as figurine and for decorating home or office.