Natural limestone is a naturally occurring sedimentary rock primarily composed of calcium carbonate, while concrete is a man-made material made from a mixture of cement, aggregate (like sand and gravel), and water, meaning limestone has a unique, organic appearance with natural variations in color and texture, while concrete is more uniform and can be molded into various shapes, but may appear less aesthetically pleasing over time; limestone is generally considered more durable and resistant to weathering, though it can be susceptible to acidic substances, whereas concrete can crack or deteriorate if not properly installed or exposed to extreme conditions.
Key differences:
- Origin:
Limestone is a naturally occurring rock, while concrete is a manufactured material.
- Appearance:
Limestone has a unique, natural appearance with variations in color and texture, while concrete has a more uniform look depending on the finishing techniques used.
- Composition:
Limestone is primarily made of calcium carbonate, while concrete is composed of cement, aggregate, and water.