limestone

This term describes a specific geological material characterized by its calcium carbonate composition. It is most frequently associated with architecture and construction due to its relative ease of carving and durability, evoking images of ancient monuments and classical facades. As a geological substance, it is treated as an uncountable mass noun. When referring to the material in bulk or as a soil type, it does not take a plural form; instead, specific quantities are described using partitive phrases such as a slab of limestone or a layer of limestone.