127 



Copper, native— Occurs as extremely thin foil interbedded in 

 fissures in the slate adjacent to the elvans. 



Cyanosite — On the roof and sides of adit, North Valley. 



Diaspore — In the Stanhope Mine, but not abundant, as 

 shining, flattened, and brittle prisms of a yellowish 

 brown colour. 



Fhiorite — Variety chlorophane. Somewhat plentiful, occa- 

 sionally in irregular masses without distinct crystal- 

 lisation. 



Hematite — Variety Reddle. The common matrix of the 

 stanniferous portion of the surface workings of the 

 mine. 



Limonite — Equally as abundant as the last. The Brown 

 Face is mainly composed of this substance, the 

 black tin being usually irregularly disseminated 

 throughout the mass. 



Lithomarqe — Commonly soft and unctuous, more or less 

 coloured by ferric-oxide. 



Malachite — Occurs in thin coatings and patches in the gossan, 

 at the Brown Face. 



Melanterite — Found incrustatirg in the old adits. 



Monazite — Occurs in aggregation of small crystals of a light 

 brown colour, with wolframite in the West Bischoff. 



Muscovite — The unaltered mineral is extremely rare. As 

 detailed in the context, it has almost invariably 

 undergone considerable alteration. 



Orthoclase — Can rarely be distinguished, as it Las in most 

 instances undergone topazisation, and can only then 

 be detected by optical characters. 



Pholerite — In the Stanhope mine this substance is sometimes 

 met with in considerable masses. It is an extremely 

 soft aggregate of mineral scales with a glimmering 

 lustre. 



Pyrolusite — The earthy variety is commonly intermixed with 

 limonite. 



Pycnite — As detailed, this is one of the most characteristic 

 minerals of the Bischoff elvans. 



Pyrites — Abundant both in the amorphous and crystalline 

 forms. 



