Black Tourmaline resonates with the Earth energy, making this a top stone for grounding. Black Tourmaline is a powerful stone to work with that may assist you with good luck, security, protection, grounding and will absorb the negative energy around it. Image shows the amount of 1lb however it is sold by approximate weight only, each bag being unique is sizes, shapes, colors, and inclusions. From Brazil. 10-35mm in size