Among the beachcombing finds were sand dollars, sargassum and pumice stone. Pumice ... ranging from white to light gray, and is often used in industrial applications like abrasive cleaning ...
asked how to clean rust on a toilet bowl, and I recently learned a quick, nonchemical, and effective way to clean my hard-water stains: a pumice stone on ... can also be used as mulch when cut ...
They have since sent samples of the pumice stone - which range "from marble to basketball size" - to researchers at the Queensland University of Technology (QUT) in Australia. Associate Prof Scott ...