What are the materials used in constructing a chimney masonry?

Chimney masonry is typically constructed using materials such as firebrick, which can withstand high temperatures, and regular bricks or concrete blocks for the outer structure. Mortar, often made from a mixture of cement, sand, and lime, is used to bind the bricks together. Additionally, a metal flue liner may be installed to enhance safety and improve draft efficiency. Insulation materials may also be added to prevent heat loss and protect surrounding structures.