Notes on some Mineral Localities in the Northern 
Districts of New South Wales. 
By D. A. Porter, Tamworth. 
[Read before the Royal Society of N.S.W., 5 November, 1884.] 
imperfect cleavage, and often penetrated by prisms of orthoclase. 
The associated minerals are topaz, tourmaline, corundum, gold, 
and cassiterite. The quartz crystals of this locality have probably 
been derived, as also the tourmaline, topaz, and orthoclase, from 
drusy cavities in the granites of the surrounding mountains ; this 
ety 
brown, rarely black, colourless. The purple variety (amethyst) 
not uncommon. ssociated minerals, gold, cassiterite, and blue 
this locality. 
* N.E. is a contraction for the New England District. 
