103 



(>OLD. Case 80. 



Q,uartz from Mount Morgan, Eavenswood, Eidsvold, Gympie, Queensland. 

 Eockhampton, Charters Towers, Mount Shamrock, Croydon, and 

 elsewhere, mostly representing these fields as they were some 

 years ago. 



292, Mount Morgan ; ironstone gossan, with characteristic 

 iridescent tarnish. A large specimen of the gossan is shown in 

 case 103. 



6423, Mount Morgan ; ironstone rich in gold. 



1185, Mount Morgan ; auriferous sinter. 



2873, Near Eockhampton; gold coating crystals of pyrites. 



2680, Gym pie; calcite crystals showing gold. 



7016, Waratah Mine, Croydon ; quartz showing native silver, 

 and assaying about 11 oz. gold and 400 oz. silver per ton. 



2656, Mount Bartle Erere ; alluvial gold. 



In case 116 will be found igneous rocks from the Croydon 

 Gold-field, and country rocks from Gympie. 



A few quartz specimens from Sandhurst and elsewhere. Victoria. 



6753, Golden Mountain, Goulburn Eiver ; granite showing 

 gold. 



7243, Glynn ; auriferous qaartzite. Tasmania. 



A few gold ores from South Australia and New Zealand. 



Kalgoorlie. — Among the most interesting of the specimens ia Case 79. 

 the Museum is the collection of telluride ores from Kalgoorlie. West 

 The ore occurs in a highly altered igneous rock, probably to ^^ ^^ ^^' 

 some extent granitic in origin. It is characteristically dark 

 green in colour, with a tendency to a schistose or slaty 

 structure near the ore-body. The ore-body itself is not a lode, 

 but a zone of country-rock, highly mineralised and more 

 highly altered than that surrounding it. The telluride minerals 

 occur in veins and blotches. Several varities, but principally 

 the pale brassy calaverite, are present. Picked specimens of 

 these tellurides will be found in case 92 ; here only the ordina.rj 

 I 



