Black Tourmaline can be placed in each corner or entry way in your home to guard and protect from Negative Energy and Intent. Black Tourmaline is also one of the most powerful metaphysical stones. Its ability to Repel Negative energy whilst cleansing and balancing an area is second to none. You can also place next to your treasured possessions for extra protection. *Pieces are about 1-2 inches long. This picture is an representation of the type and quality of the gemstone you will be receiving. As you know, there are slight variations due to the natural character of this product.