9 
The analysis given below is of the heartstone now being worked at 
the Grampian quarries opposite Stawell. Compared with an analysis made 
in 1901 from the same quarry it shows a very marked improvement. 
The analysis of the heartstone is of a very favorable character, and it 
implies that the stone possesses a composition that should insure very 
valuable qualities for building and other purposes. The stone formerly 
quarried ana used in the public buildings of Melbourne was obtained from 
the middle zone and was not deep enough from the surface. By using 
such stone the reputation of the Stawell stone has been damaged in a 
manner that was not merited. The discrepancies between the two anlayses 
may probably be accounted for by considering the conditions which exist 
at the quarry. • The quarry is at the foot of the mountain and above it 
are slopes of 2,000 to 3,000 feet of exposed sandstone beds. The sand¬ 
stone is porous, and rain has leached out iron, lime, alkali, &c., from 
some of the exposed beds, and these solutions have soaked into other beds 
lower down, in this manner increasing the percentages of iron, alumina, 
lime, soda, and potash in the rock so far as these solutions penetrated, 
but below that depth the rock is normal. It is this unaltered rock from 
the bottom of the quarry which has now been analyzed. 
With stone having the above composition it would be desirable to have 
a series of tests applied so as to thoroughly establish its usefulness. The 
quantity available is inexhaustible and the railway is already built to 
connect the quarry with the main line. As Melbourne expands a very large 
demand for this stone may arise if its value is indisputably established. 
A series of tests as to its porosity, its resistance to pressure, and its 
behaviour in the atmosphere of the city would be of great value. There is 
no other similar sandstone in the State which could be made available. 
The cost of quarrying should be reducible now to much less than the former 
price, and the quarrying and transporting of this stone to Melbourne should 
give employment to a considerable number of men. 
A 
B 
C 
Si0 2 
93.01 
96.19 
71.16 
a 1 2 6 3 
3.61 
1.90 
16.19 
Fe 2 Oo ... 
0.88 
0.37 
0.36 
FeO ° 
— 
0.06 
0.68 
MgO 
trace 
0.09 
0.60 
CaO 
0.71 
trace 
1.77 
FTa 2 0 
0.40 
0.04 
4.73 
k 2 o 
0.19 
0.39 
2.03 
HoQ -(100°C) ... 
0.24 
0.11 
2.17 
BUO + (above 100°C) 
0-82 
0.48 
0.22 
c6o 
0.53 
nil 
... present: not detd 
TiO, 
— 
0.10 
0.11 
p 
trace 
nil 
trace 
s 
trace 
nil 
trace 
Cl 
— 
trace 
trace 
100.39 
99.73 
100.02 
Sp. Gr. 
2.326 
2.618 
2.665 
Analyses by Mr. P. G. W. Baylv, Ass. R.A.S.M. 
A. Analysis of Stawell sandstone published in the Annual Report 
of the Mines Department for 1901. 
