Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "Lapideum Regnum" nom. inval. - mineral kingdom
           Class "Petrae" - stones
             Order "Vitrescentes" - glassy stones
               Genus "Silex" - silica
                 1.0 ["Pyromachus" - flint] see flint
                 2.0 ["Calcedonius" - chalcedony] see chalcedony
                 3.0 ["Jaspis" - jasper] see jasper
                 4.0 "Carneolus" - carnelian
                 5.0 "Malachites" - malachite
                 6.0 "Turchesia"
                 7.0 "Sardius" - sard
                 8.0 ["Achates" Theophrastus - agate] see agate