70 ‘MINERALS OF TASMANIA. 
gives all the characteristic results. It has been obtained in 
moderate quantity, with Galena and Arsenical Pyrites, near 
George’s Bay; in minute particles with Crocoisite, Adelaide 
Proprietary Silver mine, Dundas. This mineral has not been 
observed on the mainland of Australia. 
235. VANADINITE (Vanadiate of Lead). 
Obtained in extremely limited quantity as small implanted 
globules and thin incrustations on Siderite, with minute crystals of 
Galenite and Sphalerite; it is of a reddish-yellow colour normally, 
but weathers yellow and again fading to a dirty brown. So far it 
has only been detected at the Bell’s Reward Silver mine, 
Heazlewood. 
236. WOLLASTONITE (Silicate of Calcium). 
A massive white mineral generally obtained in lamellar masses. 
Mr. W. R. Bell, in Uitteris, states that “the tabular spar at 
Highwood, south from the Hampshire Hills, merges gradually 
into a crystalline rock much resembling a variety of Diallage, 
which is brown in colour.” 
237. WOLFRAMINE (Hydrated pure or earthy Tungstic 
Acid). 
Occurs as pulverulent, earthy, and more rarely semi-crystallized 
patches and bands of a more or less intense yellow colour. It is 
commonly adherent to and coating Wolframite, from the decom- 
position of which it is derived. Ben Lomond. 
238. WAVELLITE (Phosphate of Alumina). 
This is invariably in all known localities a rare and local 
mineral. It has been discovered in a rock cutting in a greyish- 
green clay-slate. The mineral occurred in the cleavage planes of 
the rock in the form of flaky, radiating discs, of a white and 
glistening appearance, which are ustially under a quarter of an 
inch in diameter. Australasian Slate quarry, Back Creek; onthe . 
Forth River, south of the Van Diemen’s Land Company’s track, 
in 1864, associated with Galena and Blende (James Smith) ; at 
Mount Ramsay, as white circular patches with a strongly radiating 
structure implanted upon Hornblende ; of small size in altered 
slate at Mount Bischoff. (W. R. Bell). 
239. WOLFRAMITE (Tungstate of Iron). 
Usually occurs in a massive form or in radiating blades penetra- 
ting and intermixed in a Quartz gangue. It varies little in colour, 
being almost invariably of a dark brownish-black, with a sub- 
metallic lustre. Recently this mineral has become of considerable 
commercial importance for the production of Tungstic Acid, 
which is principally used to give greater hardness to steel and 
