Limestone is a sedimentary rock created from calcareous residues of plants and animals. Limestone often contains what’s left of sea creatures and fossils. It is natural calcium carbonate and will give way to lime when heated up. Limestone has a smooth grainy surface and varies in rigidity. Some thick limestones can be polished, but cannot be as glossy as marble or granite. Colour tones tend to be neutral and are often used as durable flooring and bathroom accents in buildings. Limestone can be etched by acids (soft drinks included). It soaks up oils and liquids and is likely to get more easily discoloured than marble. Colour tones are typically neutral. Limestone is gaining popularity, but is usually honed (not shiny like marble). It has a smooth granular surface and varies in solidity. Acid-based chemicals for cleaning can scratch limestone, which should only be cleaned with a simple, gentle alkaline-based cleaning agent.