Amazonite has a powerful filtering action. Blocks geopathic stress, absorbs microwaves and cell phone emanations, and protects against electromagnetic pollution. A soothing stone which calms the brain. 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 1/4″ to 1″ in length. Cost is per piece.