Limestone

Limestone is defined as a sedimentary stone with at least 50% by weight, Calcite or Calcium Carbonate content. Almost all limestone is composed of grains or fragments of biologic origin, ranging from fossils or organically derived grains.  Most limestone is marine in origin composed of micro sized fossils of marine invertebrate organisms like shells found on most beaches. Limestone is made up of three minerals, siderite, magnesite, and dolomite.  Dolomite is considered both a mineral and a stone.  Limestone on the Mohls Scale has a hardness rating of H=3.

Limestone is an excellent choice for bathroom countertops, floors, and interior and exterior wall cladding.  This material is more porous than some of the harder stones, therefore without proper sealing, is susceptible to staining.  However, this material is widely used as a building stone because it is readily available and easy to handle.