Limestone is a sedimentary rock which is formed at the bottom of the ocean. It consists wholly or mainly of calcium carbonate. In its pure state it is white but it may be coloured by other materials. This calcite is sourced primarily from the shells and bones of marine organisms. The sediment that builds up preserves these organisms into fossils. Over millions of years heat and pressure cause a chemical reaction which turns this sediment into limestone.
![Waterfall limestone tiles indoor chenzira brushed](/images/limestone/limestone_tiles_indoor_chenzira_brushed.jpg)