Raw Black tourmaline crystal is considered one of the most powerful protection stones known to man. It is said to repel negative energy and circulate stagnant energy at home, work or anywhere you choose to place it. Please note that each black tourmaline crystal is natural and unique meaning they will vary in color, shape and texture to the ones shown in the photographs. S I Z E 20-40 mm D E L I V E R Y Your black tourmaline crystal will be sent Standard Shipping (no tracking number). Please note Europe delivery is approximately 3-9 working days. Worldwide delivery is approximately 6-9 working days. The envelope is recyclable and is made with at least 60% recycled content. D I S C L A I M E R Please note black tourmaline is not a replacement for legal, medical or any other professional advice. Choking Hazard - Not suitable for children under 36 months.