52 CATALOGUE OF MINERALS ; 
Chalcopyrite occurs in the Tinaroo district in an argentiferous ore 
in the Try-no-more with marcasite, galena, and sphalerite, and in 
the Tornado claim with sphalerite, mispickel, and galena ; in the 
Try-again and Chance mine chalcopyrite, sometimes coated with 
sulphate of copper, is also found with marcasite. 
The Mount Perry district is perhaps most notable for the occur- 
rence of chalcopyrite, it being found here in very large quantities 
of an auriferous character, and frequently of the iridescent or 
“peacock” variety, sometimes associated with bornite. 
Auriferous chalcopyrite with iron pyrites, assaying 2 ozs. of gold 
to the ton occurs in the Buck Line of reef at Ravenswood ; also 
on Charters Towers with galena, iron pyrites, and mispickel ; and 
in the Rockhampton district 
At Clermont (Peak Downs) chalcopyrite accompanies iron 
pyrites, and is also found crystallized in the Mount Orange 
copper mine, on the Nebo goldfield. 
STANNITE—T1In Pyrites—Comp. sulphide of tin and copper 
with some iron and sometimes zinc. 
Tin pyrites occurs with copper pyrites in Stewart’s T claim, and 
is reported to have been met with in the Herbertina claim, both 
in the Tinaroo district. 
Judging from the composite nature of the minerals in this 
district I am led to think that the occurrence of tin pyrites is 
often overlooked. 
MARCASITE—WHITE PyRITES—Comp. Fe S,. 
Marcasite occurs with chalcopyrite in the St. Patrick’s Day 
claim, Tinaroo ; also in quartz at Happy Valley, Bowen ; and in 
diorite and porphyry, at the Seventy-mile Range, between the 
Burdekin and Cape Rivers. 
I have already referred—under the paragraph on iron pyrites— 
to the Etheridge mundic ores; some of these are sufficiently 
stable, while in others again decomposition goes on at a great rate, 
and, from the dirty appearance of the decomposition products, 
renders a determination of the composing materials a matter of 
great difficulty. Some of the most decomposing ores seem to me 
to be almost entirely marcasite, while in others it is possible to see 
clusters of small cubical pyrites surrounded and interspersed with 
decomposing mineral matter, 
