15*2 THE MINERALS OF TASMANIA. 



Amethyst. — Of a beautiful clear violet colour. A gem- 

 stone much in use for ornamental work. In large 

 detached abraded crystals in stanniferous drift at 

 Moorina; in the Emu River, about 4 miles south of the 

 Hampshire Hills; also occurs at Mt. Cameron and Blue 

 Tier. 



Chalcedony. — Semi-transparent, with a waxy lustre ; 

 often in mammillated form, but never in a crystallised 

 condition. Of a greenish and brown colour, apparently 

 infiltered in cavities and seams at Beaconsfield ; in banded 

 brown-coloured masses at Flinders Island ; as waterworn 

 pebbles, Swanport ; Lake Sorell ; Tamar Heads ; Cornelian 

 Bay ; Lisle ; Mt. Cameron ; Meredith Range ; Heazlewood ; 

 Pieman River; Zeehan; as crustified masses, Corinna, Pie- 

 man River. 



Cornelian. — Of a more or less variegated red coloura- 

 tion, often banded with white and yellow, and sometimes 

 showing crystalline aggregations. Fingal ; Flinders Island ; 

 Swansea ; River Forth ; Cornelian Bay ; Lake Sorell ; 

 Ilfracombe ; Supply Creek ; Longford ; and many other 

 localities. 



Jas'per. — Usually dull-red colour, but sometimes green or 

 yellow. Near Corinna in alluvial drift with crustified chal- 

 cedony and quartz ; a close, compact green variety, not 

 unlike the New Zealand greenstone, occurs in the Arthur 

 River, about 6 miles below Waratah. 



272. Randanite (Infusorial Earth). 



Found in small quantity ; contains many fresh-water 

 forms of diatomaceoe. Inglewood, near Oatlands (Bur- 

 bury) ; in depressions between the dolerite hills of the 

 neighbourhood ; it has been found in thin seams occasion- 

 ally ranging up to as much as 12 inches in thickness, and 

 sometimes very pure. 



273. Restormelite (Hydrous Silicate of Aluminium and 



Iron). 



As at its original locality, Restormel Mine, Cornwall, 

 this substance occurs as a coating on psilomelane and other 

 manganiferous material. It is white to pale-greyish blue, 

 sometimes almost a clear blue. The incrustation is invari- 

 ably thin, but quite noticeable and distinct. 



Locality: The Comet Mine, Dundas. 



