For centuries crystals have been used for a variety of purposes. From decoration and jewellery to healing, magic and for attracting positive energy. Black Tourmaline is considered one of the strongest minerals on earth that can be used to protect against negative energy and thoughts. Seen as a symbol of strength it is associated with grounding spiritual energy and dispersing energy blockages. Cleansing. Purification. Grounding. Each box contains approximately 280g of loose Black Tourmaline rough crystal chips in various sizes. Mined in Brazil.