Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Petræ - stones
           Order Calcarii - calcareous stones
             Genus Spatum - feldspar see feldspar
               Spatum compactum, opacum nitidum - orthoclase