32 UNRECORDED AND OTIIKR MINKRALS 



70 SuLPHcm. — (Native.) 



Found ill minute blebs on crystallised and other 

 galenite. Magnet Mine. 



71 Symplesite. — (Hydrous iron arsenate.) 



Occurs thickly coating gossan in small radiating blue- 

 green tufts, of great attractiveness under the lens. 

 Magnet Mine. 



72 Tennantite. — (Sulpharsenite of copjjer.) 



Analysis of a sample from No. 4 adit, Mt. Lyell 

 Mine : — 



94-79 



73 Tephroite. — (Orthosilicate of manganese.) 



Occurs in crystallised masses of a dark reddish- 

 brown colour and greasy lustre. Blyth River. 



74 Tetrahedrite. — (Sulphantimonite of copper.) 

 Variety, Freihergite. 



Analysis of a pure sample from the Hercules Mine, 

 Mt. Read: — 



Ag = 9-82 per cent. = 3201-32 ozs. per ton. 



All = -0019 „ = 13 dwts 



Cu = 29-76 



As = 2-69 



Fe = 4-56 



S = 27-21 



9i-7319 



Balance, insoluble matter. • 

 Occurs in well developed crystals at the 650-ft. level, 

 Western Mine, Zeehan. 



75 Thomsonite. — (Hydrous sodium- calcium-aluminium 

 silicate.) 



In bunches of white capillary fibres coating vughs 

 in the nephelinite of the Shannon Tier. 



