- Healing stone: Black tourmaline protects against electromagnetic waves and harmful radiation, promoting well-being and rest. - Natural rough stone: Extracted directly from the mineral in its natural form, without treatments that alter its authenticity and purity. - DIY carving: Ideal for making jewelry such as pendants, necklaces, bracelets, or rings. - Easy to use: Place the black tourmaline on the chakras to relieve pain and release negative energies. - Multi-purpose crystal stone: Can be used to decorate hydroponic plants and fish tanks, purify water, feng shui, and flower and lawn cultivation.