Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           "minerals constituting rocks"
             "Quartz, and Silicates containing alumina, without water"
               feldspar
                 oligoclase [([NaSi]0.9-0.7[CaAl]0.1-0.3)AlSi2O8]