ITNflECOEDED AND OTHEU MINEEALS IN TASMANIA. 19 



8 Arsenopyrite. — (Sulph-a/}'senide of iron.) 



In peculiar minute crystal trillings implanted }n 

 cavities in hard gossan. Magnet Mine. 



As minute needles abundantly scattered throughout 

 siderite gangue. Block 291, E-ingville. 



Analysis of this Mineral. 



Fe = 32-95, 



As = 43-20, 

 S = 21-48, 



97-63, 

 with about 2 per cent, of antimony. 



4 AuGiTE. — (Variety of pyroxene.) 



The embedded crystals of the nephelinite of the 

 Shannon Tier are of a shining black colour, and 

 often of remarkably large dimensions, sometime* 

 one inch and a half in length. 



5 Beresowite. — (Chromate and carbonate of lead.) 



Occurs as small, in many cases almost microscopic, 

 lamellae implanted in gossan. The colour varies 

 from pale yellow to orange-red. It is sometimes 

 changed to crocoisite. Magnet Mine. 



6 Beryl. — (Metasilicate of beryllium and alntninium.) 



At the Shepherd and Murphy Mine, Bell Mount, 

 specimens have occurred several inches in length, 

 wholly changed to gilbertite, fluor, and chlorite. 

 At the same locality small slender crystals have 

 been met with of a pale green colour, intermixed 

 with quartz, topaz, molybdenite, and cassiterite. 

 The crystals are commonly embedded in a thin 

 film of pyrite. 



7 BouRNONiTE. — (Sulphantimonite of lead- and copper.) 



In bright well-developed orthorhombic crystals, which 

 gave the following result upon analysis : — 



S = 13 62 per cent. 



Sb = 28-68 



Pb = 42-39 



Cu = 11-93 



Fe = 1-97 



98-40 



