Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Lapideum - mineral kingdom
         Class Petræ - stones
           Order Vitrescentes - glassy stones
             Genus Qvartzum [U.R. von Kalbe], [1505?] - quartz
               1 Qvartzum aqueo-album
               1.0 Qvartzum see Qvartzum aqueo-album
               2 Qvartzum luteum
               2.0 Pseudo-Topazius see Qvartzum luteum
               3 Qvartzum rubrum
               3.0 Pseudo-Rubinus see Qvartzum rubrum
               4 Qvartzum purpureum - amethyst
               4.0 Pseudo-Amethistus - amethyst see Qvartzum purpureum
               5 Qvartzum cœruleum
               5.0 Pseudo-Saphirus see Qvartzum coeruleum
               6 Qvartzum viride
               6.0 Pseudo-Smaragdus see Qvartzum viride
               7 Qvartzum viridi-cœruleum
               7.0 Pseudo-Beryllus see Qvartzum viridi-coeruleum