432 



PROCEEDINGS OF THE ACADEMY OF 



[Aug., 



Elements; nonmetallic: 

 metallic : 



diamond, graphite 

 iron, nickel, palladium, osmium, 

 iridium, iridosmine, platinum 



b. Metamorphosed (additional to those of a) 



Metasilicates; pyroxenes: 

 amphiboles : 



hydroxy : 

 Orthosihcates; epidotes: 

 oxy-: 

 micas : 

 hydroxy- : 



Carbonates : 

 Oxides; 2:3: 



double; spinels: 



€. Weathered 

 Silicon oxides: 

 Orthosihcates; hydroxy-: 

 hydrous- : 

 Oxides; hydroxy-: 

 Hydroxides : 

 Carbonates; calcites: 

 hydrous : 



jadeite 



anthophyllite; tremolite, asbestus, 

 actinolite, hornblende 



talc 



epidote 



sillimanite 



muscovite, margarite 



chlorite (many varieties), serpen- 

 tine, deweylite, sepiolite 



calcite, dolomite, ankerite 



corundum 



magnetite 



quartz, chalcedony, opal 



chloropal, genthite 



allophanite 



limonite, diaspore 



brucite 



calcite, magnesite 



hydromagnesite, zaratite, reming- 



tonite 

 Note.- — Meteorites would be included here. 



I. 2. A. Silicic Pegmatites 



a. Primary 



Silicon oxides: 

 Acid sihcates: 

 Feldspars; orthoclases: 

 plagioclases : 

 Metasilicates; pyroxenes: 

 amphiboles : 

 miscellaneous : 

 Orthosihcates; garnets: 



helvites : 

 scapolites : 



quartz 



petalite, milarite 



microcline, anorthoclase 



albite, oligoclase 



augite; spodumene; rhodonite 



actinolite, hornblende 



beryl, iolite, poUucite 



almandite, andradite, spessartite, 



pyrope 

 helvite, eulytite 

 wernerite 



