This powerful string bracelet will ground and protect you throughout your day. Hematite can be called a “stone for the mind”, and can be used for mental attunement, memory enhancement, original thinking, and technical knowledge. It boosts self-esteem and imparts self-confidence. Tourmaline Black is a powerful protective and grounding stone; it is a centering and focusing stone and encourages a positive attitude to your life. Black tourmaline grounds your root chakra and purifies your energy body; it protects you against electromagnetic smog.