An extremely powerfula and protective stone. It is a natural tranqulizier, promotes emotional balance and protects against psychic attacks. Amethyst also blcoks geopathic stress and negative energies in the environment. Helps with dreams and sleep. All rocks will vary by size, colour, clarity. This is the natural forms of these products.Occassionally stones will also have fault lines, being a natural substance these are part of the beauty of the product. Rocks will vary from 1/4in to 1in, in length. Cost is per piece.