Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           "minerals constituting rocks"
             "Alumina-Silicates containing water"
               zeolite Cronstedt, 1756
                 brewsterite (Brooke, 1822) D.S. Coombs et al., 1997
                   1 brewsterite-Srᵀ Coombs et al., 1997
                   2 brewsterite-Ba Coombs et al., 1997