There are a variety of synonyms that can be used for the term "quartz mill." One option is "stamp mill," which refers to a type of mill that uses heavy metal stamps to crush ore into smaller pieces. Another synonym is "rock crusher," which refers to a machine that is designed to break down larger rocks into smaller pieces for processing. "Grinding mill" is also a suitable synonym, as it refers to a machine that grinds materials into powder or fine particles. Other options include "pulverizer" and "crushing machine," which both describe equipment that crushes and grinds materials for further use.