Also known as schorl, black tourmaline is one of the most beloved protection and grounding stones. Historically, these deep-black crystals have been used to: Prevent nightmares, better sleep Ward off psychic attacks Reduce stress & anxiety Absorb & deflect negative energies Encourage feelings of belonging Protect homes Growth and transformation Tourmaline is a beautiful and affordable spiritual tool that can assist with: root chakra healing meditation clearing spaces grounding grid work energy shielding ABOUT OUR ETHICAL CRYSTALS Because many of our unpolished black tourmaline pieces are used for spiritual healing, we only purchase from the most reputable gemstone and crystal dealers. Each of our crystals is wholly unique, with a variety of shapes, edges, and occasional mica flakes. These are perfect for crystal lovers, experienced energy workers, and to add protection to crystal pouches. Pack of 12 any size combo. Sm .5" - .75" M 1"-1.75" Lg 1.75" to 2.5" and chunkier