Ideal for drawing thin lines on your quilt top and is safe for all fabrics. Soapstone is as easy to use as a pencil—it can be sharpened to a fine point, allowing you to make precise markings. Perfect for use on dark fabrics, the markings remain for quite some time but will rub off when you no longer need them. You must handle soapstone carefully as it is a naturally soft, delicate substance. Packaging may vary.