【Absorbing Radiation】: Magnetic field of black tourmaline can also prevent the symptoms of electromagnetic waves in modern society, such as irritability and insomnia, while helping to protect the wearer from harmful radiation 【A Perfect Decoration】: Healing crystal stones is made of natural tourmaline rough. The irregular shape is the perfect craft decoration. You can put the rough tourmaline in the fish tank, which is not only pleasant, but also keeps the water quality magnetized and clean, allowing the fish to grow healthily 【DIY Carving】: Rough tourmaline is also a good jewelry making material. You can DIY your favorite necklace or bracelet or ring by polishing the stone. The mineral healing stone will be a good meditation healing stone 【Wide Application】: Rough rock meditation Kit can be used to decorate hydroponic plants and fish tanks, and can also be used for water purification, sauna, Buddha offering, Feng Shui, flower and grass cultivation, etc 【Rough Rock Mineral Healing Stone】: Calcium carbide, also known as "tourmaline", has a complex chemical composition. It is a boron-containing silicate mineral, including aluminum, sodium, iron, magnesium and lithiums