Often translucent in appearance, calcite conveys a clean and polished look to suit any style or design. Calcite is a common constituent of sedimentary rocks, limestone in particular, much of which is formed from the shells of dead marine organisms. Approximately 10% of sedimentary rock is limestone. Calcite is a softer carbonate mineral – more comparable to marble in terms of hardness – ranking about a 3 on the Mohs Hardness Scale. Calcite can scratch, etch and stain just like marble can if not sealed or cared for properly. Calcites are generally better suited for a bathroom environment because it is a low-traffic area that won’t take as much of a beating from day-to-day activities.