LIST OF MINERALS OCCURRING AS CONSTITUENTS OF IGNEOUS ROCKS. (I) 



Allanite 



Amphibole-group 

 Hornblende 

 Arfvedsonite 



Apatite 



Chromite 



Cordierite 



Eudialyt 



Garnet group 

 Melanite 

 Pyrope 



Hematite 



Ilmenite 



Leucite 



Magnetite 



Mica-group 

 Biotite 

 Lepidolite 

 Muscovite 

 Rubellan 



ORIGINAL MINERALS. 



Monoclinic felspars 



Orthoclase 



Sanidine 

 Monoclinic pyroxenes 



Aegirin 



Augite 



Diallage 



Diopside 



Nepheline (Eloeolite) 

 Nickel-iron 

 Olivine 

 Perowskite 

 Quartz 

 Rhombic pyroxenes 



Enstatite 



Bronzite 



Hypensthene 

 Rutile 

 Skapolite 



Sodalite-group 



Sodalite 



Hauyn (Nosean) 

 Sphene 

 Spinelle-group 



Pleonaste 



Topax 

 Tourmaline 

 Tridymite 

 Triclinic felspars 



Microcline 



Anorthoclase (2 > 



Albite 



Oligoclase 



Andesine 



Labradorite 



Bytownite 



Anorthite 

 Zircon 

 &c., &c. 



(1) It docs not fall within the scope of the present work to describe in detail the chemical 

 and physical characters of the rock-forming minerals. For information on this subject the reader 

 is referred to treatises on mineralogy and to one or more of the following works. 



FOUQTTE AND LEVY. Mineralogie Micrographique. Paris, 1879. 



ROSENBUSCH. Mikroskopische Physiographie der Petrographisch wichtigen Mineralien, 

 2nd Edit. Stuttgart, 1885. 



HUSSAK. Einleitung zum Bestimmen der Gesteinsbildenden Mineralien. Leipzig, 1885. 



(2) ROSENBUSCH proposes this term for certain potash-soda felspars (isomorphous mixtures 

 of orthoclose and albite with or without anorthite), which have been examined and described by 

 KLEIN (Tiber die Felspath im Basalt vom Hohen Hagen. Gottingen Nachrichten, 1878, No. 

 14), Brogger (Die Silurishen Etagen 2 und 3. Kristiania, 1882, pp. 260 and 293) and FOESTNEB 

 (Uber die Felspathe vom Pantellaria fZ.K., 1883, VIII. p. 125). 



(4) And probably also other felspars. 



