244 J. MILNE CURRAN. 
tin-bearing granite. The exact place is not far to the left of the 
road from Inverell, through Auburn Vale, to the Round Mount 
Diamond Mine. 
In colour the beryls vary a good deal ; some havea very choice 
light blue, but green and blue-green tints prevail. The peculiar 
etched specimen on the plate was found in alluvial drift at Scrubby 
Gully, Inverell. A small prism in my own collection was found 
in a wash under basalt, on Kangaroobie Station near Ophir. 
Being of a light green colour, it is probable that some stones of 
this class are recorded in the “Minerals of New South Wales,” 
as emerald. In fact Professor Liversidge gives it as his opinion 
that beryl is probably meant.! I have had a blue beryl from 
Tingha cut, and it made a gem that should satisfy the most 
fastidious. When mounted its brilliancy was faultless, sug- 
gestive somewhat of a blue topaz, but with a very much finer 
surface lustre. Plate 15 gives a good idea of the appearance of 
these stones when found in cradling, sluicing, or puddling for 
tinstone. 
Topaz. 
New South Wales excels in this gem-stone. If we except the 
famous Maxwell-Stuart topaz,” the largest and clearest stones in 
the world have been found in the New England districts of this 
Colony. 
Mode of Occurrence. 
The topaz has been found in its original matrix as well as 
generally in the tin-bearing drifts about Tingha, Inverell, and 
Emmaville. The association of tin-stone and topaz is very 
marked and is easy to explain. The tin stone is invariably found 
in lodes and veins in granite. The same granite has proved the 
matrix of topaz. Specimens are not rare showing tin-stone, topa, 
fluorspar, and smoky quartz, in the same matrix. At the Pro- 
ae 
1 The Minerals of New South Wales, by Prof. Liversidge, London, 
1888, p. 199. 
2 Mineralogical Magazine, Vol. 111., p. 93. 
