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
               1 Genus "Cos"
               2 Genus "Qvartzum" [U.R. von Kalbe], [1505?] - quartz
               3 Genus "Silex" - silica