6 MINERALS OF TASMANIA. 
18. ANKERITE (Carbonate of Lime, Iron, and Magnesia). 
A brown Dolomite containing a considerable proportion of Iron. 
Occurs on the Heazlewood; Maestrie’s Broken Hill Mine at 
Dundas; North Valley Silver-lead mine at Mount Bischoff, where 
it forms a black weathered gossan capping a lode, of which it is 
the gangue; at the Godkin Silver Mine it occurs intermixed 
with dark- coloured Calcite, both of which often contain Native 
Silver, Galena, and an amorphous blende. 
19. ANTIMONY, NATIVE. 
Occurs in minute irregular flakes and patches distributed through- 
out the silicious ganeue of an argentiferous lode on the property 
of the Hays Prospecting Association, Castray River. 
20. ARGENTITE (Sulphide of Silver). 
Silver Glance is an extremely rare mineral in this Island, the 
only authentic localities are the Godkin Extended, Whyte River, 
the Hampshire Silver Mine, at the Hampshire Hills, and Mount 
Lyell. At the first it occurs in an almost pure state—assaying 
at the rate of many thousands of ozs. of silver per ton—as worn 
rounded “slugs” with blocks and masses of Galena and Huastolite 
in the workings of the mine. The slugs are of small size, rarely 
exceeding an inch in diameter, and are always coated with a black 
“pug” formed by the decomposition of various minerals. At 
the Hampshire Hills it was obtained many years ago in the form 
of minute crystals implanted upon other minerals and in the 
cavities of lode material. (W. R. Bell). 
It has been recorded as occurring at the Scamander River and 
at Mount Bischoff (Johnston “ Geology of Tasmania.”) At 
Mount Lyell it is found with Chaleopyrite and other minerals 
plentifully scattered throughout a quartz matrix, which is said to 
occur as a wide band on the footwall of the enormous mass of 
interbedded Pyrites for which the locality is celebrated. 
21. ASBESTUS (a variety of Hornblende). 
Following Dana (“A Text Book of Mineralogy, 1885,”) I 
retain this term for the fibrous substance belonging to the Horn- 
blende or Amphibole group: the term is commonly applied to 
fibrous Serpentine. Occurs in extremely short silky bunches, 
approaching the variety termed Amianthus, with a form of. 
Actinolite and Mountain-cork, in an adit on the property of the 
Whyte River Proprietary Prospecting Association, Whyte River. 
(See CurysoTre). 
22. ANGLESITE (Sulphate of Lead). 
As a rule this is not an abundant mineral, except at special 
localities. From its physical appearance it is usually mistaken for 
the Carbonate of Lead and called such. The finest examples yet 
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