50 CATALOGUE OF MINERALS ; 
Several specimens of zinc-blende from Ravenswood I have 
found to contain cadmium, but have not yet determined the 
percentage in any case. 
CHALCOCITE, REDRUTHITE, COPPER GLANCE—Comp. Cu, S. 
This sulphide has been met with in the Alliance gold mine, 
Morinish, Rockhampton, in quartz containing gold. I understand 
that in its crystalline state it has not been noticed; the 
specimen I examined was massive, and of the ordinary dark 
leaden-grey colour. 
CINNABAR—Comp. Hg. S., generally impure in massive form. 
The only known occurrence of cinnabar, I believe, is in the 
Kilkivan district, where this ore of mercury occurs sometimes in 
limestone. An analysis of this limestone containing cinnabar 
gave Mr. A. W. Clarke the following result — 
Carbonate of lime . . 50.83 per cent. 
+ iron , - 20:00 
Silica ‘ : ‘ -  atSarg aie 
Sulphide of mercury . FO 
98.97 
The cinnabar was determined by the use of Sonstadt’s solution, 
and the specimen analysed is said to be hardly characteristic of 
the Kilkivan cinnabar deposits. 
A portion at least of the country rock of this district is a 
serpentine, apparently accompanied by a variety of enstatite. 
I am of opinion that cinnabar will be found on the main range 
above Murphy’s Creek, as I thought I detected this mineral in a 
specimen cf gravel from a creek brought to me from there by a 
miner ; the specks were too small for me to speak authoritatively 
on the matter. 
PyRRHOTITE—Macnetic Pyrires—Probable Comp. Fe, 5,. 
Pyrrhotite and peroxide of iron form the wellknown brownstone 
of Charters Towers which “coincide with that superficial part of 
the rock which is not permanently saturated with water and into 
which the atmosphere penetrates. The ‘brownstone’ is ‘mundic’ 
which has undergone oxidation, the pyrites being altered to 
pyrrhotite—a change similar to that which can be produced 
artificially, as in the experiments of Rammelsberg and Berzelias, 
who (according to Dana) obtained Fe, S, by heating pyrites 
(Fe S,)’—R. L. Jack. 
Ravenswood may be mentioned as another field on which 
auriferous pyrrhotite occurs, 
