Amethyst is a type of quartz that is mostly found in geodes and hollow agates. It is composed of silicon dioxide, and scores a 7 on the Mohs hardness scale. From different angles, amethyst occurs in primary hues from a light pinkish violet to a deep purple.
Special Color is a method using tools to make marks on the surface of metal. These marks have the same length and width, giving the metal a unique and special texture.