240 A. LIVERSIDGE 



The silver chloride occurs also in a pure white kaolin in irregular 

 strings and branches ; when the mass is cut through the kaolin 

 presents a beautiful marbled appearance, from the green veins, 

 strings and points of silver chloride being irregularly spread over 

 a dead white ground ; after exposure to the light for a time the 

 veins and markings, of course, become black. 



Silver Sulphide — Argentite. 



In small particles scattered through vein quartz ; associated 

 with it is a little iron pyrites and iron sesquioxide. No crystals 

 of argentite could be detected. 



Locality — Wollombi, thirty miles from Armidale. Collected 

 by Mr. J. M. Smith of Sydney. 



The second specimen is from the Day Dream district. Massive 

 of about 6 oz. in weight, weathered externally and coated in part 

 with mica. 



Staurolite. 



In a black mica schist with crystals of common garnet, from 

 about two miles north of the Acacia Dam, Broken Hill. Mr. 

 Marsh states that the schist stands up in narrow bands above 

 the associated rocks on account of its being less rapidly weathered. 



The staurolite crystals are in twin groups in the form of St. 

 Andrew's cross, and vary from J" to y in thickness and up to §-' ' 

 long. These are much larger than those previously described.* 



Tourmaline. 

 From the quarries in granite, about three miles east of Silverton. 

 An irregular fragment of a large crystal of tourmaline, about one 

 and a half inches through and two inches long ; the broader end 

 of the crystal has a quartz core. 



Zinc Carbonate. 



From Broken Hill Proprietary Company's Mine. In the form 



of small, colourless complete scalenohedrons or dog's tooth crystals, 



slightly curved. Surfaces somewhat rough, about ^V long by 



tV through, very uniform in size. Perfect rhombohedral cleavage. 



* Liversidge, Minerals of N.S. Wales, 1888, p. 181. 



