48 CATALOGUE OF MINERALS ; 
A sample of galena, iron pyrites, and sphalerite from the 
Tornado Claim, Silverfield, gave on analysis by Mr. A. W. 
Clarke also :— 
Zinc - : - - 13.42 per cent. 
Copper . ; ; ‘ iS eTOm ae 
Lead P , ‘ : 6:06 4} 
Arsenic . F , - MIEQGOION ys 
Iron = = : 5 6420/00 a 
Sulphur . : ; ot GOA es 
Silica Z F ; ‘ 210. ays 
100.48 
The same sample assayed by myself for silver gave only 1 oz. 
2 dwts. per ton of ore. 
A cupriferous galena, decomposing to litharge and cerussite, 
occurs at Mount Garnet and the neighbourhood towards Coolgara. 
Auriferous galena occurs only sparingly outside of Australia, but 
is not uncommon in California and Rio Grande do Lul, Brazil. 
Galena in Queensland is coarsely or finely granular ; it occurs 
massive and in well defined cubes, also in twins. I have not yet 
noticed or heard of the occurrence of any pseudomorphs after 
galena, the cerussite which so frequently accompanies it being 
crystallized in the usual orthorhombic forms. 
BoRNITE.—Comp. (Cu,, Fe) S. 
Occurs at Mount Perry in association with other copper ores, 
and at Cloncurry; specimens from this latter place are of a 
reddish bronze colour on the clean fracture, but on exposure they 
tarnish with very beautiful purple and blue tints. 
At Mount Perry bornite sometimes is found in steatite 
associated with chalcopyrite. 
SPHALERITE or ZINC-BLENDE.—Comp. Zn S, but often containing 
cadmium. 
In the Tinaroo district sphalerite occurs with chalcopyrite, 
mispickel, and galena in the Tornado claim, Silverfield, and with 
galena and mispickel in the Kohinoor, Newelltown. 
Auriferous sphalerite occurs with iron pyrites in the Hector claim, 
Ravenswood, and with iron pyrites, chalcopyrite, and galena at 
the Currency Lass and Politician claims, Ravenswood. Sphalerite 
and galena, assaying 100 ozs. of silver per ton, is found in the 
Bonnie Dundee, Ravenswood. Auriferous sphalerite occurs in 
association with iron and copper pyrites in quartz at the Alexandra. 
