A tertiary crusher is a machine used in the mining and construction industries for reducing the size of medium to hard materials into finer particles. It typically follows primary and secondary crushing processes. While primary crushers break large stones into smaller pieces, and secondary crushers further reduce the size, tertiary crushers achieve the required final size and shape of the material. Common types of tertiary crushers include cone crushers, vertical shaft impact crushers, and high-pressure grinding rolls (HPGR). These machines ensure the material is adequately processed for its intended use in construction, mineral processing, or other industrial applications.