THE MINERALS OF NEW SOUTH WALES. 207 



Occurs in the form of white crystals and massive in New 

 England, near Bingera, also in one or two places near Gulgong, 

 where in one place it is said to be found in association with calcite 

 opal, asbestos, epidote, sphcerosiderite, mispickle, blende, galena, 

 pyrites, and copper pyrites in an auriferous vein traversing a 

 diorite. It occurs crystallized with translucent quartz at Mount 

 Dixon, Dewelamble, Murrumbidgee, and with quartz, chlorite, and 

 green mica on the Coolalamine Plain and at the head of the 

 Yarralumla. 



JSTepheline. 



Chem. Comp. : Aluminium, sodium, and potassium silicate. 



Hexagonal system. Occurs in amygdaloidal porphyry between 

 the " Pinnacle," Dowagarang, and the Old Man Canobolas, near 

 Wellington. 



Spodumene. 



Chem. Comp. : Aluminium and lithium silicate. Oblique. 

 Mr. Wilkinson reports its probable occurrence at Oura Station, 

 near Wagga Wagga. 



Hauyne. 



Chem. comp. : Silica, alumina, soda, lime, and sulphuric acid. 

 Cubical system. 



The Rev. W. B. Clarke discovered some small specimens of a 

 blue-coloured mineral which he believed to be hauyne, below the 

 Windindingerie Cataract, in association with flesh-coloured 

 felspar, adularia, quartz, and epidote. 



Hydrous Silicates. 



Clays. 



Kaolin, or China Clay. 



Is derived from the decomposition of felspar, and is not uncom- 

 mon in many parts of the Colony. A deposit of kaolin suitable 

 for the manufacture of the best porcelain is reported to occur 

 at Lambing Flat, King's Plains, and another of a dazzling white 

 colour on a hill near to Pocky Pidge, which is in association with 

 a bright and pretty coloured lavender clay derived from decomposed 

 basalt. 



Fire Clays. 



Of good quality are common throughout the coal measures; 

 and in the shales, claystone nodules which would probably yield 

 high-class cement are plentiful. 



Brick Clays. — Large deposits of clay, which burn to red, white, 

 and intermediate colours, are common in the County of Cumber- 

 land, derived from the disintegration of the Wianamatta shale. 



