Natural tourmaline with micca, quartz and other minerals. No two are alike! Average size is 3.5″ long x 2″ x 2″. Black Tourmaline is the ultimate and most powerful protection stone. It is the epitome of transmutation of energy, specifically negative energy. This stone grounds us, deeply, which shows us where negative beliefs, energies, and harmful experiences are coming from; which directions we need to be protecting our energy, where our own blocks are getting in our way, and where our boundaries may be a little weak or unhealthy. Black Tourmaline protects us from EMFs (Electro-Magnetic Frequencies) The Mica in this piece offers a gentleness to this stone, rounding out the very grounded energies with some subtle lifting in frequency. Mica is calming, soothing, and perfect for getting a deep and relaxing night’s sleep.