OCCURRING IN TASMANIA. 29 



53 Perofskite. — (Tifanite of calcium.) 



Microscopical crystals in the melilite basalt of the 

 Shannon Tier. 



54 Petterdite. — {A new oxychloride of lead. Fro. 



Royal Soc, Tas., 1901.) 

 Occurs implanted and in bunches of pseudo-hexa- 

 gonal crystals — Britannia Mine. Zeehan. 



55 Pharmacosiderite. — (Hydrous basic iron arsenate.) 



Found as coatings of microscopic cubic crystals of an 

 intensely green colour and bright lustre — Magnet 

 Mine. (R. F. Waller.) 



56 Phosgenite. — (Chlorocarbonate of lead.) 



Some fine adamantine crystals of this somewhat rare 

 mineral have been obtained at the Comet Mine, 

 Dundas, with anglesite and cerussite. 



57 PiCOTiTE. — (Aluminafe of inagnesium and chrome.) 



Chrome spinel is stated to occur in the vicinity of 

 Zeehan. (Krause, "_ Mineralogy," p. 245.) Abun- 

 dant in the alluvial of the Heazlewood River. 



58 Prosopite. — {Hydrous fluoride of aluminium and 



calcium.) 

 Occurs as a granular powder, and often kaolinised. 

 It is associated with decomposed green tourmaline 

 (zeuxite), which is so characteristic of Mt. Bischoff 

 Tin Mine. 



59 Rhodonite. — {Metasilicate of manganese.) 



Massive^ in a somewhat impure form as a boulder 

 in a large asbestos seam in serpentine on the 

 ground leased to the Australasian Asbestos Com- 

 pany at Anderson's Creek, west of Beaconsfield. 

 Called "red quartz" by the miners. (W. H. 

 Twelvetrees.) 



60 Saponite. — (Hydrous magnesium and cduminium 



silicate.) 

 Occurs in patches of a yellow to brown colour and 



glimmering lustre, with chrome ochre and quartz 



on the hanging-wall of a reef at the Duchess of 



York Mine, Salisbury. 

 White and amorphous at Trial Harbour. West 



Coast. 



