The term cut base top polish means that the mineral is in its natural shape and only the point has been polished. Crystal points are often used to direct energies through the apex of a point. Each stone is unique in shape, size, and colour. Amethyst is the purple variety of quartz crystal, composed of silicon dioxide with traces of iron. As a healing stone it is said to be helpful in ridding nightmares. Just hold the Amethyst crystal on the forehead for a minute and ask it to guide you through a peaceful sleep, then place it under your pillow. Also helpful to calm an overworked and overstressed mind. It is thought to dispel negativity and create a peaceful environment.