Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "Lapideum Regnum" nom. inval. - mineral kingdom
           Class "Petrae" - stones
             Order "Calcarii" - calcareous stones
               Genus "Marmor"
                 1 "Rudia"
                 2 "Nitida"
                 3 "Fugacia"