CoTELLiTE (Indigo Copper Ore.) 

 Very fine specimens of this mineral, in the massive form, 

 have been obtained from the mines on Torke Peninsula, the 

 most characteristic being chiefly taken from the southern end 

 of the district. A more or less impure variety, black in colour, 

 occurs not unfrequently, more especially in the northern part 

 of the district. 



The mineral which generally passes under the name of 

 Melaconite in the Torke Peninsula mining district is actually 

 Covellite. 



Burr mentions " black sulphuret of copper" as occurring at 

 the Kapunda Mine. 



BoEXiTE {Furple Copper Ore). 

 This mineral occurs at several of the copper mines in the 

 colony, generally associated with chalcopyrite (copper pyrites). 

 The most notable locality is the Moonta Mine. The analysis 

 of a specimen of massive Bornite from the Moonta Mine 

 yielded the following result : — 



100-55 ICOOO 10000 

 Column II. shows the composition of the specimen after deduct- 

 ing the insoluble residue, and column iii. is the percentage 

 composition calculated from the formula 9 CU2S, 2 PcgSg. 



Bornite occurs at the Lady Alice Mine, the Barossa Mine, 

 the Burra Burra Mine and the Try Again Mine. 



Tate reports its occurrence in the quartz veins in the meta- 

 morphic rocks in the neighbourhood of the Peake, Central 

 Australia, and Burr at the Kapunda Mine. 



As far as the writer is aw^are, the mineral has only been found 

 massive. 



C HALC OP YKiTE ( Copper pyrites) . 



This mineral is of pretty general occurrence in the lower 

 parts of the copper lodes of the province. It has been found 

 crystallised at the Wallaroo Mine. Some of the crystals in 

 my collection obtained from thence measure from half an inch 

 to three quarters of an inch in diameter. 



Although this mineral forms the chief copper ore of the 

 Yorke Peninsula mining district, it only occurs pure in any 

 considerable quantity at the Moonta Mine. In the other parts 

 of the district it is more or less intimately mixed with pyrite, 

 covellite, bornite, &c. 



