THE MINERALS OF NEW SOUTH WALES. 175 



Manganese. 



The ores of manganese do not appear to have been discovered 

 in any great abundance in New South Wales. 



Wad. 



An impure oxide of manganese. 



At Long Gully, near Bungonia, it is met with having a more or 

 less botryoidal form and platy structure ; of a black colour, soft 

 with a black shining streak • in association with quartz, both as 

 small veins running through the quartz and as an external coating 

 or incrustation. A specimen from this locality was found to con- 

 tain 1*57 per cent, of cobalt, and 0*36 per cent, of nickel (Dr. 

 Thomson.) 



It is abundant in the diamond drift near Mudgee, both as a 

 cement and incrustation ; often dendritic in outline. The incrusta- 

 tion on many of the pebbles is evidently quite recent. 



It is very common as dendritic markings on rocks in many parts 

 of the Colony. 



It is found to the north of Cotumba, loose on the ground ; also 

 at Orange. 



A peculiar form of wad is found in cavities in the basalt at 

 Hill End ; this variety is very soft and porous, being composed of 

 minute scales arranged loosely together in a concentric manner — in 

 fact, having a structure similar to that of wood ; externally it has 

 somewhat a frothy appearance, with a metallic lustre ; so soft that 

 it blackens the fingers, and will hardly bear handling without 

 crushing. 



KlJPFERMANGANERZ. 



Cuprous manganese. Chem. comp. : An impure oxide of 

 manganese, containing a few per cent, of black oxide of copper 

 and oxide of cobalt. 



Found in the Coombing Copper Mine, with native copper, cuprite, 

 copper carbonates, and sulphides. 



Zinc, 



Zinc Blende. 



Chem. comp. : Zinc sulphide = ZnS. Found massive, and crys- 

 tallized in small hemihedral forms belonging to the cubical system. 

 Many of the crystals have beautiful bronze and purple metallic 

 tints. 



With tin, gold, manganese, copper pyrites, galena, and other 

 minerals, on Major's Creek, near Bungonia. 



With gold, iron, copper pyrites, and asbestos, in a quartz veil), 

 Wiseman's Creek, near Bathurst. Orange 



