362 NOTES ON SOME NEW SOUTH WALES MINERALS. 



NOTES ON SOME NEW SOUTH WALES MINERALS. 



(Note No. 5.) 



By A. Liversidge, M.A., F.R.S., Professor of Chemistry in the 

 University of Sydney. 



[Bead before the Royal Society of N.S.W., December 5, iS'88.] 



The following notes were illustrated by specimens of the 

 minerals mentioned. 



Antimony. 



Native antimony occurs in calcite with gold, blende, mispickel, 

 &c, at the New Reform Gold Mine, Lucknow. (See Gold p. 364.) 



Barklyite = Al 2 3 . 



The opaque more or less magenta coloured variety of ruby 

 known as barklyite, has been sent me for identification by Mr. D. 

 A. Porter, from New England. This had previously been found 

 at Two Mile Flat, Cudgegong. 



Cassiterite or Tin Stone = Sn0 2 . 



A very finely divided tinstone occurs in elvan at Bellandean, 

 Tenterfield, and might easily be overlooked by miners who are 

 only used to the ordinary appearance of tinstone as it occurs in 

 New South Wales, since this form from its grey colour and finely 

 divided condition is liable to escape recognition. 



Associated with it are occasional scales of glistening pearly 



white gilbertite mica. 



COBALTINE. 



The sulpharsenide of cobalt Co As., CoS 2 found with erythrite 

 at Carcoar, in massive lumps, with a granular structure. 



Covelline or Indigo Copper — -Copper sulphide = CuS. 



This mineral occurs with redruthite, the copper sub-sulphide 

 Cu 2 S and other sulphur ores of copper at Cobar and other copper 

 mines in New South Wales. 



Erythrite or Cobalt Bloom. 



Hyd rated arseniate of cobalt obtained by Mr. J. A. McKillop, 

 near Carcoar, where it occurs in association with cobaltine, 

 molybdenite tfec. The erythrite is present in groups of silky 

 radiating acicular crystals of a beautiful peach colour. Also in 

 globular and uniform masses, and in incrustations, which present 

 a remarkable pearly pink lustre on the freshly fractured surfaces. 



