150 



be readily shaped by cutting, and is used in a variety o£ ways. 

 No deposits of couunerciai value are known in New South Wales. 

 The best specimens of foliated talc from this State are from the 

 Abercrombie District, and of fibrous talc from Gilmandyke, near 

 Eockley. 



Foliated talc from Mount Gipps, Euriowie, Cootamundra, 

 Tumbarumba, and Abercrombie. Steatite from Abercrombie, 

 Goulburn, Eed Hill (Barrier Eange), Wiseman's Creek. 



Saponite. Hydrated silicate of alumina and manganese ; Dumbarton 



(Scotland). 



Pyrophyllite"' Hydrated silicate of alumina ; Gundagai. 



Pilinite. Hydrated silicate of lime, alumina, and lithia ; New Almaden 



quicksilver mine, California. 



Glauconite. Hydrated silicate of alumina and potash; France. Also 



Sydney District (case 31). 



Epidote. Silicate of alumina, lime, and iron. A yellowish-green mineral 



frequently mistaken for copper ore. It sometimes occurs as a 

 secondary mineral in altered andesites and other lavas. It is 

 sometimes associated with native copper, in small quantities. 



Hockley, Eramaville, Pambula, Blayney, Bunnamagoo. A fine 

 specimen from Blayney, associated with felspar, is in case 147. 



TliuUte ; manganese variety ; Norway. 



Pistacite ; variety rich in iron ; Russia. 



Case 100, Under this heading is included a number of silicates differing 

 Garnet. from one another in containing lime, alumina, magnesia, or other 



oxides, but agreeing in crystal form, in hardness, and in specific 

 gravity. The hardness is about the same as quartz, so that 

 garnet cannot be scratched with a knife ; the specific gravity 

 varies a good deal, but is always greater than quartz ; generally 

 the w^eight is at once noticed when a specimen of fair size is 

 lifted. The crystal form is very characteristic, consisting of the 



