Limestone

Limestone:  Has simple a character with smooth delicate features and granular surface, varying in hardness.  More likely to stain than marble.  Common colors are black, grey, white, tan or brown.  It does not show graining or crystalline structure.  Limestone is known to contain lime from sea water.  A sedimentary rock mainly composed of mineral calcite.  The primary source of the calcite is typically marine organisms, which are deposited on the ocean floors as pelagic ooze.  Popular uses include bathrooms, flooring, interior and exterior cladding and exterior paving.