BY ^X. F. PETTERD, C.M.Z.S. 151 



ford; Laimceston; in concentric layers, Franklin Rivulet; 

 East Arm of Port Sorell ; near Latrobe ; Kentish Plains ; 

 white, of a fine silky texture, Queen River, east of 

 Howard's Plain; of a bright colouration and compact 

 form. Little Forester River ; Lake Sorell ; Conara ; S'wan- 

 sea ; pseudomorphous after stems, Hobart. 



Cacholong. — A milk-white, compact, siliceous substance, 

 occurring as thin veins and filling cavities in basalt; it is 

 opaque, and usually somewhat dull in lustre. Near Laun- 

 ceston. 



Frojse. — Amorphous, usually of a yellowish-brown and 

 waxy lustre, Hampshire Hills ; as brown to dark-green 

 waterworn pebbles, Lake Sorell ; with adularia and ordin- 

 ary quartz in the granite rock near its junction with meta- 

 morphic slate, Tasman Rivulet; a brown porcelain-like 

 form is abundant at the Magnet Range. 



Agate. — A variegated variety of quartz, the colours 

 being arranged in bands, concentric layers, and cloudy 

 masses. River Leven ; Cranbrook, near Swansea; River 

 Forth ; Flinders Island ; Cornelian Bay ; Lake Sorell ; 

 Heazlewood ; and other places. 



Morion. — Black quartz. Blue Tier ; Flinders Island ; 

 Ben Lomond; a mammilated black quartz in a solid com- 

 pact form occurs on the west branch of the Savage River, 

 nearly opposite Long Plain. 



Hornstone. — A variety resembling flint, opaque to 

 translucent, dull and glimmering lustre. In colour, from 

 white to black Lydian stone. Lilydale ; Oyster Bay ; 

 Flinders Island; Cornelian Bay; Mt. Nelson; Mt. Bis- 

 choff ; Pieman River ; Macquarie Harbour ; River Forth ; 

 and elsewhere. 



Common Opal. — An amorphous hydrated form of a 

 milk-white to pale-brown colour and vitreous lustre. 

 Port Cygnet ; Lake Sorell ; Cornelian Bay ; Macquarie 

 Harbour ; Supply Creek ; Mt. Cameron ; Pieman ; Dugam 

 Range, near the Montagu; Proctor's-road, near Hobart. 



MenUite. — A dull brownish to white translucent variety 

 of common opal, occurring in irregular reniform lumps or 

 nodules, which are impressed on the surface with angular 

 depressions. In stanniferous drift, Gould's Country. 



Geyserite. — A white hydrated form, occurring in cellular 

 masses mixed with native sulphur. Mt. Bischoff. 



Eoi<e-quartz. — Of rare occurrence, and then not nearly 

 so clear as that obtained in Bavaria and other places. 

 Local examples are generally somewhat ferruginous and 

 cloudy. West Coast ; Beaconsfield ; Moorina. 



