TABLES. 373 



Table B. — Alteration products of minerals — Continued. 



Calcite alters to dolomite, wollastonite. 



Cancrinite alters to calcite, gibbsite, natrolite. 



Chabazite alters to natrolite. 



Chlorite alters to berlanite, enophite, lirnonite, quartz. 



Chondrodite alters to brucite, serpentine. 



Clinohumite alters to brucite, serpentine. 



Corundum alters to diaspore, cyanite, gibbsite, margarite, muscovite (da- 



mourite), sillimanite, spinel, zoisite. 



Cummingtonite alters to bastite, quartz. 



Cyanite alters to kaolin, gibbsite, muscovite (damourite), talc (steatite). 



Diallage alters to calcite, chlorite, epidote, feldspar, magnetite, quartz, 



smaragdite. 

 Diaspore alters to corundum, cyanite, margarite, muscovite, sillimanite, 



spinel, zoisite. 



Diopside alters to calcite, magnetite, quartz, serpentine, talc, tremolite. 



Dolomite alters to - calcite, diopside, tremolite, wollastonite. 



Enstatite alters to quartz, serpentine, talc. 



Epidote alters to calcite, gibbsite, kaolin, lirnonite, quartz. 



Fluorite alters to calcite. 



Garnet alters to aphrosiderite, calcite, chlorite, diaspore (conjectural), 



epidote, gibbsite (conjectural), hematite, hornblende, 



hypersthene, iron oxide, kaolin (conjectural), limon. 



ite, magnesite, magnetite, quartz, siderite. 



Gehlenite alters to ..fassaite, grossularite, talc. 



Gibbsite alters to corundum, cyanite, diaspore, margarite, muscovite, 



sillimanite, spinel, zoisite. 



Grossularite alters to calcite, meionite, quartz, zoisite. 



Grunerite alters to hematite, lirnonite, magnetite. 



Gypsum alters to anhydrite, calcite. 



Hauynite alters to calcite, chabazite, diaspore, gibbsite, natrolite, stilbite. 



Hematite alters to lirnonite, magnetite, marcasite, pyrite, siderite. 



Heulandite alters to albite, orthoclase. 



Hornblende alters to augite, biotite, calcite, chlorite, epidote, hematite, 



magnetite, quartz, serpentine, siderite. 



Humite alters to brucite, serpentine. 



Hypersthene alters to actinolite, anthophyllite, bastite, hematite, lirnonite, 



magnetite, quartz, serpentine, talc. 

 Ilmenite alters to hematite, lirnonite, magnetite, octahedrite, rutile, 



titanite. 



Iolite alters to chlorite, chlorophyllite, pinite. 



Laumontite alters to albite, analcite, orthoclase, prehnite. 



Leucite alters to analcite, kaolinite, muscovite, nephelite, orthoclase. 



Lirnonite alters to hematite, siderite. 



Magnetite alters to hematite, lirnonite, siderite. 



Marcasite alters to hematite, lirnonite, magnetite, pyrite. 



Margarite alters to dudleyite. 



Marialite alters to biotite, kaolin, muscovite, quartz, talc. 



Meionite alters to biotite, calcite, epidote, gibbsite, kaolin, muscovite. 



Mesolite alters to prehnite. 



Microcline alters to allophane, biotite, cimolite, damourite, epidote, gibbsite, 



halloysite, kaolin, muscovite, newtonite, pyrophyl- 



lite, quartz. 

 Muscovite alters to diaspore, gibbsite, paragonite, serpentine, talc (steatite), 



vermiculite. 



