[Healing stone]:This stone is believed that black tourmaline is a very effective stress reliever. It helps heal the connection between your body and mind. [Good jewelry making material]:You can DIY necklace or bracelet or ring you like by polishing the stone. [Perfect fish tank]:Maintain water quality magnetization clean, let the fish healthy growth. [Perfect craft decoration]:This crystal is made of natural crystal stone, with creative shape, it is a perfect craft decoration. [Ideal for hydroponic plant]:You can place it in potted plants, make the pot unique, an ideal decoration for hydroponic plant.