BY W. F. PETTERD. 63 



Allophane. — {Hydrate silicate of aluminium.) 

 Found as irregular, fairly large masses, outwardly 

 coated with a pulverulent white powdery substance 

 of secondary origin. The colour varies from pale 

 yellow to a much darker shade. Tlie general appear- 

 ance of the mineral is remarkably gum-like. The 

 composition is quite unusual, but there is little doubt 

 about the identification. 

 Analysis by Mr. Watson, of the Magnet Silver-mining 



Company : — 



Si O2 = 19-00 

 AJ, O3 = 40-40 

 Fe.3 0.3 = 4-70 

 Ca O = 69 

 S O3 = 1-61 

 Ioriiitit)n= 33 '30 



99-70 



3 Antimony {Native.) 



Occurs in thin radiating patches, about an inch in 

 diameter, on a silicious gangue. This is the first 

 record of the occurrence of this somewhat rare 

 mineral in this State. I have only seen one specimen, 

 and that is in the collection of Mr. K. F. Waller, 

 although I am informed a slab about a foot square 

 was obtained, practically covered with the radiating 

 metal. Locality : Spray Section, British Zeehan 

 Mine, Zeehan. 



4: Apatite {Phos'phate of calcium.) 



As very minute crystals, about two millimeters in 

 length, of a pale pinkish colour, abundantly scat- 

 tered throughout a stanniferous gi'anite. Crystal 

 Hill Mine, Blue Tier. 



5 Areagonite {Orthorhomhic carbonate of calcium.) 



Occasionally obtained in vughs in basalt as subradiat^ 

 ing thin columnar crystals, which do not rarely 

 exceed 2 inches in length. They are highly polished, 

 glassy clear, and colourless. This is by far the finest 

 occurrence of this mineral in the Staite. Locality : 

 Briseis Mine, Derby. 



6 Beresowite {Chromate ctnd carbonate of lead.) 



This mineral has been found to be much more abun- 

 dant at the Magnet Mine than hitherto supposed. 

 It occurs in the decomposed or superficial portion of 

 the lode, and is confined to cracks and small vughs 



