Limestone is a sedimentary rock composed largely of calcite. Limestone often resembles untouched beds of the ocean with displays of remaining shells and corals. Commonly Limestone is produced in a honed finish, as most are not able to take a high polish due to its delicate nature. Limestone displays hues of soft ivory to subtle browns and greys, which compliment any coastal surrounds. A low to mid-range hardness allows these stones to be used internally and some limestones, also externally.