48 THE MINERALS OF TASMANIA. 



Mt. Read, a chlorite schist occurs, which iii places is wholly 

 that substance. 



Occasionally abundant in stanniferous lodes at Ben 

 Lomond and Heemskirk ; at Bell Mount, west of Mt. 

 Claude, with sphalerite ; as chlorite schist it is abundant 

 between Waratah and the West Coast. The substance 

 occurring at Bischoff that is usually termed chlorite is a 

 greenish tourmaline rock, which is characteristic of that 

 locality. 



A fibrous radiating variety occurs at Mt. Ramsay and 

 Hampshire, the former of a pale-green and easily decom- 

 posable, the latter of a darker colour, more durable in 

 nature. At the Laurel Creek, near Mt. Housetop, the 

 mineral occurs as a vein in a mineralised dyke ; it is of 

 various colours and much stained with iron oxide. At the 

 Prince George Mine at Heemskirk in sheaf-like aggre- 

 gations, which cross each other, and are sometimes radiat- 

 ing ; at the Hampshire Hills as chloritic porphyry, in two 

 dyke-masses running almost parallel, which are traceable 

 for a considerable distance. On the north-eastern tinfield 

 this mineral is distributed, but usually in small quantity ; 

 it occurs as a constituent of protogine, a stanniferous rock, 

 at Ben Lomond and Gould's Country. 



Chlorite in reality forms a group of minerals which 

 appear to merge one into the other, and they are at the 

 best most unsatisfactory. The numerous varieties occur- 

 ring in this island have not been carefully investigated. 



A dark-green variety of chlorite occurs at Stony Ford, 

 near George's Bay, which shows the unusual association of 

 cassiterite with garnet, blende, and copper pyrites. 



77. Chloanthite f Diarsenide of Xickel). 



A greyish-white isometric nickel mineral, remarkable 

 for readily altering or sweating on the surface, when speci- 

 mens are in a moist atmosphere, to the hydrated arsenate, 

 which on giving off its excess of hygroscopic moisture 

 apparently becomes annabergite. It occurs in limited 

 quantity, with other nickel minerals, in the lower levels of 

 the Long Tunnel Mine, Rocky River. 



Several fair-sized masses of this mineral have been 

 obtained from what has been reported to be a small lode 

 situated on a mineral section known as the Central Bal- 

 strup, at Zeehan. They all show distinct, but somewhat 

 distorted, isometric crystals, which are much intergrown. 



