168 the minerals of new south wales. 



Phosphocalctte. 



JPseudomalachite. — Chera. Comp : Hydrous copper phosphate 

 = Cu 5 P 2 O 10 + 3H. 2 0. Copper oxide, 67*0 ; phosphoric acid, 23*9 ; 

 water, 9*1 = 100. Rhombic system. Colour, dark-green. 



Coombing Copper Mine. 



Arseniate of Copper. 



Mentioned as occurring in a quartz vein on the Cox River, but 

 it is not stated whether the mineral was condurrite, olivenite, or 

 one of the other arseniates. 



The next group of copper ores comprises the various Sulphur 

 Compounds of Copper. 



Redruthite. 



Erubescite, vitreous copper ore, copper glance. 



Chem. comp : Copper disulphide = Cu 2 S. Copper, 79*8 • sulphur, 

 20 '2 = 100. Rhombic system. 



I have only seen this mineral in the massive state, but it is 

 found crystallized in South Australia. It is of a lead-grey colour, 

 soft, and leaves a shining streak. 



Found at Cobar ; Manilla waters, near Bowral ; near the Wel- 

 lington Caves, with blue and green carbonates in a quartzose vein- 

 stuff; also at Wellbank, near Wellington ; at Cardiangullong 

 Creek, with iron pyrites ; at Bathurst, Kroombit, Icely, Carcoar. 



Bornite. 



Purple ore, Buntkupfererz. 



Chem. comp : = (Cu 2 Fe) S 2 . Varies considerably. 

 Copper, 56 to 70 • iron, 6 to 17 ; sulphur, 21 to 26. 

 Cubical system • colour, copper red, purple to brown • massive ; 

 fracture, even to small conchoidal • streak blackish-grey, shining. 

 Found at Cobar ; Bingera ; Wellbank, Wellington District. 



Fahlerz. 



Grey Copper Ore. Tetrahedrite. 



Chem. comp. : 4CuS + Sb 2 S 3 but variable. 



Part of the copper often replaced by iron, zinc, silver (up to 

 30 percent.), mercury, or cobalt • and the antimony partly replaced 

 by arsenic and occasionally bismuth. 



Cubical system, usually in tetrahedral forms — hence one of its 

 synonyms ; colour, grey ; soft, cuts with shining streak. 



Occurs on the west side of Copper Hill, near Molong. 



