238 A. LIVERSIDGE. 



Quite recently some beautiful groups of almost perfect crystals 

 have been brought from the same locality, i.e., Kingsgate, near 

 Glen Innes. 



Quartz — Cellular or Porous. 

 Mount Morgan, Queensland. This has very much the porous 

 and cellular appearance of the silica deposited from hot springs, 

 and has accordingly been described as Geyserite by Mr. R. L. 

 Jack, f.g.s., Government Geologist for Queensland. Reference is 

 made to this under Haematite, p. 236. 



More or less cavernous specimens of quartz are met with in the 

 New Reform Mine, Lucknow, and are known to the miners as 

 " Lode clinker." These are of a dull brown and earthy appear- 

 ance externally, and are evidently pseudomorphous after calcite. 



Redruthite — Grey Copper Sulphide. 

 Occurs with crystallized azurite, malachite and silver chloride 

 in the Broken Hill Proprietary Company's Mine. 



RUTILE. 



Acicular hair-brown crystals of this mineral are met with in 

 quartz at Tingha. Mr. D. A. Porter of Tamworth has had some 

 specimens cut and polished with good effect. 



Siderite — Iron Carbonate. 

 Obtained from vugs in the Umberumberka Mine. The specimen 

 is built up of plates forming cavities, in some cases almost cubical 

 a,nd in others more or less rhombohedral, and varying in size from 

 one eighth to one inch or so across. On the walls of these cavities 

 are scattered small but well formed crystals of anglesite (lead 

 sulphate); the black colour is apparently due to some galena and 

 perhaps zinc blende. 



When powdered the mineral effervesces slightly with cold 

 hydrochloric acid and evolves sulphuretted hydrogen, and on 

 qualitative analysis was found to consist essentially of carbonate 

 of iron and zinc with small quantities of blende, manganese, lead, 

 and traces of silica and lime. 



