TABLES. 371 



Table A. — Sources of minerals — Continued. 



Lepidonielane is derived from artvedsonite. 



Limonite is derived from actinolite, ankerite, anthophyllite, arfvedsonite, biotite, 



bronzite, chlorites, epidote, garnet, greenalite, griin- 

 erite, hematite, hornblende, hypersthene, ilmenite, 

 magnetite, marcasite, olivine, parankerite, pyrite, 

 pyrrhotite, serpentine, siderite. 



Magnesite is derived from garnet, olivine, pyrope, serpentine. 



Magnetite is derived from -..actinolite, ankerite, arfvedsonite, augite, biotite, bronz- 

 ite, diopside, garnet, greenalite, griinerite, hematite, 

 hornblende, hypersthene, ilmenite, marcasite, olivine, 

 parankerite, pyrite, pyrrhotite, sahlite, siderite. 



Malacon (hydrous zircon ) is derived from zircon. 



Marcasite is derived from hematite. 



Margarite is derived f rom corundum, diaspore, gibbsite. 



Meionite is derived from grossularite. 



Mesolite is derived from plagioclases. 



Mica is derived from spinel, tourmaline, vesuvianite. 



Microcline is derived from spodumene. 



Muscovite is derived from anorthoclase, diaspore, gibbsite, leucite, microcline, 



aephelite, orthoclase, plagioclase and orthoclase, 

 scapolites, sodalite, spodumene. 

 See also Damourite. 



Natrolite is derived from apatite, chabazite, haiiynite, nephelite, noselite, plagio- 

 clases, sodalite. 



Nephelite is derived from leucite, sodalite (conjectural). 



Newtonite is derived from anorthosite, microcline, orthoclase. 



Octabedrite is derived from ilmenite, titanite. 



Opal is derived from olivine, serpentine. 



Orthoclase is derived from analcite, heulandite, leucite, laumontite, stilbite. 



Osteolite is derived from apatite. 



Paragonite is derived from anorthoclase, muscovite, plagioclases. 



Pectolite is derived from apophyllite. 



Penninite is derived from.. biotite (with phlogopite). 



Perovskite is derived from titanite. 



Phillipsite is derived from plagioclases. 



Phlogopite-chlorite is derived from phlogopite. 



Pinite is derived from iolite. 



Prehnite is derived from analcite, laumontite, mesolite, natrolite, plagioclases, 



scolecite. 



Pyrite is derived from marcasite, pyrrhotite. 



Pyrophyllite is derived from anorthoclase, microcline, orthoclase. 



Quartz is derived from actinolite, anorthite, anorthoclase, anthophyllite, augite, 



biotite, bronzite, chalcedony, chlorites, cummington- 

 ite, diopside, enstatite, epidote, garnet, grossularite, 

 hornblende, hypersthene, microcline, olivine, opal, 

 orthoclase, plagioclases, prehnite, pyrope, sahlite, 

 scapolites, serpentine, tridymite, zoisite. 



Eutile is derived from brookite, ilmenite, octahedrite, titanite. 



Sahlite is derived from ankerite, parankerite. 



Scapolites are derived from plagioclases. 



Scolecite is derived from plagioclases. 



Serpentine is derived from actinolite, biotite, bronzite, chondrodite, clinohumite, 



diopside, enstatite, hornblende, humite, hypersthene, 

 muscovite, olivine, pyrope, sahlite, spinel. 



