84 



Case 71. 



Erytlirine. 



Smaltite» 



■Wiliyamite. 



CoTsaltite 



Glaucodot. 



averages about six per cent. The most cobaltiferous varieties 

 sometimes have the beautiful indigo-blue tint seen in 8420. 



Similar ores, but not payable, are found in other districts. 

 Near Bungonia it acts as a cement, binding drift-quartz pebbles 

 together (2780 and others). 



9018, assaying 2'G per cent, of cobalt, is from the Union Lead, 

 Eorbes (depth of 100 feet). 



8993, Tingha, a tin-bearing quartz drift cemented by cobal- 

 tiferous wad. 



8205, Mount Boppy, assays 2'2 per cent, of cobalt. 



8547, Macleay River, assays 6 per cent. 



Cohalt lloom, hydrous arseniate of cobalt — a peach-coloured 

 encrustation produced by the weathering of cobalt ores. The 

 specimens exhibited are all from the deposit of cobalt-bearing 

 arsenical pyrites — glaucodot — at Carcoar. Close inspection 

 shows the encrustation to consist of bundles of needle-like 

 crystals. 



Arsenide of cobalt, &c. : A tin-white mineral, characteristic 

 crystals of which will be found in case 89. It has been found in 

 small quantities at the Consols Mine, Broken Hill, associated with 

 chalybite. 1264 shows imperfect crystals. 



Sulph-autimonide of cobalt. Consols Mine, Broken Hill. 



Sulph-arsenide of cobalt. Consols Mine, Broken Hill. 



Cobaltiferous mispickel : an ore that has been mined in small 

 quantities at Carcoar, and from the alteration of which the 

 erythrine just referred to has resulted. 



9305, Inverell, is a cobalt mineral not yet investigated. 



7327, stream tin from New England containing cobalt ore. 



BISMUTH. 



Case 70. Bismuth ores are not uncommon in New South Wales, being 

 found for the most part impregnating, or as pipes in granite. 

 The demand for bismuth is very limited, its use being restricted 



