BY EDWD. B. LINDON, A.R.S.M. 73 
LINARITE—Comp. hydrous sulphate of copper and lead. 
Linarite has been noticed by Mr. R. L. Jack in the Caledonian 
mine, Tinaroo district, and in the Star River (argentine) silverfield. 
Catcire—Comp. Ca C O,. 
Calcite in association with gold or gold-bearing sulphides is a 
common feature on Queensland fields, as on the Palmer, Gympie, 
Hodgkinson, Norton, Charters Towers, and Rosewood ; on Gympie 
crystals of iron pyrites, quartz, and calcspar are indented together 
as though all three had been deposited at the same period. Cal- 
cite crystals associated with native copper and red and block 
oxides have been found on the Dugald River, 45 miles N.W. of 
Cloncurry. Inthe Uncle Tom reef, Cloncurry, the calcspar carries 
free gold, being there associated with hematite, and chalybite ; 
also on Weatherly Creek, about 18 miles from Cloncurry, a reef, 
whose matrix is quartz and calcite, yields gold in payable quantities. 
Stalactitic and stalagmitic calcite come from the Star River and 
from Glenlyon, near Stanthorpe. 
Limestone is abundant in many parts; a large quantity of very 
pure mineral occurs at Glenlyon; the limestones from Reid’s 
Gap, about 30 miles from Townsville, are extremely quarried for 
mortar ; blue coralline limestone pebbles in conglomerate are 
largely found at Glen Mowbray, near Thornborough, and large 
limestone caves are known of near Rockhampton. At Warwick 
are quarries of limestone, of which the two following analyses 
were made by Mr A. W. Clarke :— 
If Le 
Moisture . : : I.10 per cent. 1.29 per cent. 
Carbonic acid . AS OS; AZ-O5 5; 
Lime . : anf 54,009 3 5472 
Peroxide of iron : Geis O37 855 
Magnesia . ; z O15); 0-558 03; 
Insoluble residue A 1.59 5 O07) es 
100.93 100.95 
Mr. Clarke remarks, “The proprietor of the quarriés states that 
the black stone (II) burns to a better quicklime than the perfectly 
white limestone (I). These analyses do not throw much light on 
the question of why there should be such a difference. The 
insoluble matter of one is nearly double that of the other, and, as 
this residue is mainly silica, it may be that an insoluble fixed 
silicate is formed in the manufacture, which would tend to dilute 
the quicklime.” 
