77 



3859, Barrier Eange : red chaljbite. CaSC 69. 



4169 aud others, Consols Mine, Broken Hill : buff-coloured 

 variety. 



8731, Wliipstick : white variety. 



10258 in case 60, Terranderie Mine, Burragoran;? ; showing 

 excellent cleavage (some carbonate of magnesia is also present.) 



1433, Consols Mine, Broken Hill: shows the characteristic 

 form — the rliomhohedron. 



2764, Cobar Copper Mine: small crystals. 



4002, Mandurama : very tiny crystals on country rock. 



Hydrous phosphate of iron. Vivianite. 



810, Broken Hill : an earthy variety containing much magnesia, 



9568, Milburn Creek Copper Mine : good crystals on magnetic 

 pyrites, showing the characteristic blue and green tints respect- 

 ively when viewed in different directions. 



Di-sulphide of iron. One of the commonest of the metallic Pyrite. 

 minerals found ia lodes. It is the mundic of the miner. The 

 appearance of this mineral is too well known to need descrip- 

 tion ; its hardness (above 6) is an important means of distinctio7i 

 from other minerals, more particularly from copper pyrites, 

 since it cannot he scratclied loitli the point of a knife. 



The pyrites found in lode quartz frequently carries gold : 

 many specimens of such auriferous pyrites are exhibited under 

 Gold. 



The specimens exhibited here have been selected principally 

 on account of their showing some characteristic, such as crystal- 

 line form, well. The most common crystal form is the cuhe. 

 7661, Major's Creek, shows good cubes, as does the magnificent 

 specimen from Mount Stewart, in a special case near the door. 

 Another common form is the eight-sided pyramid (octahedron) 

 — 2776. A third, less common form, has twelve five-sided faces 

 (^pentagonal dodecahedron). A good crystal showing this will be 

 found in Students' case 33, against the south wall, and small 



