This document provides an overview of Chapter 9 from the course ID 218 Interior Systems, Materials and Codes. The chapter covers stone and concrete masonry, including different types of building stone, how stone is quarried and milled, concrete masonry manufacturing, concrete masonry units, and how to build stone and concrete masonry walls. The document includes exercises asking students to select appropriate concrete masonry units and mortar for different building situations, and questions for students to review key concepts from the chapter.