149 



specimens will be found in tlie New Soiitli Wales gold cases, 

 particularly from Grundagai. 



The asbestos of commerce is frequently a form of serpentine Asbestos, 

 (see page 132}. New Caledonia ; Maryland. SeTlSine 



GHOUP IV. 



Miscellaneous silicates ani oxides. 



Hydrous silicate of magnesia, alumina, and iron. A dark- OaSG 98. 

 green mineral, frequently with a very perfect cleavage resembling 

 that of mica. The cleavage-flakes are flexible but not elastic. Chlorite. 

 Chlorite can be distinguished from most micas, as it can be easily 

 scratched with the thumb-nail ; true micas cannot. Prospectors 

 frequently mistake earthy chlorite for carbonate of copper. It 

 is frequently found as a gangue mineral in ore deposits (see the 

 Bora Creek silver ores in case 58). Emmaville, Lucknow, &c. 



Jefferisite ; Pennsylvania. 



Pijrosmalite ; a worm-like variety from Nordmark, Sweden. 



ClinocliJore ; a mica-like variety from Pennsylvania and Russia. 



Hifidolite ; Pennsylvania. 



'Penninite ; a pretty pink variety on serpentine, Dundas, 

 Tasmania. 



Delessite; a fibrous variety. 10012, Wentworth Extended 

 Mine, Lucknow. 



Canada, Wattle Plat. Cliloritoid. 



Hydrous silicate of magnesia ; a very soft mineral with a greasy xalc 

 feel; w^hite to light-green in colour. Two varieties occur: 

 foliated and massive. When of snowy-white colour and very 

 pure the fibrous varieties have some commercial value, more 

 particularly as a filling for wall-paper. The massive form, 

 steatite, popularly known as soapstone, French chalk, &c,, can. 



