Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Petræ - stones
           Order Calcarii - calcareous stones
             1 Genus Schistus
             2 Genus Spatum - feldspar see feldspar
             3 Genus Marmor