214 
MINERAL CENSUS OF AUSTRALASIA. 
Bismuth oxide (Bi; O; ) =) 5OHS 
Tellurium oxide (TeO; ) meme 6) 
Tron oxide (Fe: O, ... » ny wane 
Water ... ie was, 9a ORS 
Gangue (silica) ee chet oy 
90°6n 
OutvinE.—Uralla, Bulli ; eommon in basaltic rocks of the colony ; 
(Geo. Sur., Dept. of Mines, Sydney). 
Opat.—Precious—Albert District !!!, in cretaceous sandstone 
opal silica filling cavities from which fossils have been 
removed, very suitable for inlaying work, matrix takes 
a good polish ; (Geo. Sur., Dept., of Mines, Sydney). 
OpaL.—Common—The Battery, Lachlan River, green ; Moulder’s 
Paddock, Orange, greenish ; Gundagai, green and white ; 
(Geo. Sur., Dept. of Mines, Sydney). 
PLaTINUM.—Beach sands between Clarence and Tweed Rivers—! !, 
in basaltic detritus, and associated with gold; one- 
and-a-half miles south of Evan’s Creek, Richmond River 
Heads, from beach sand; Broken Hill, in ochreous 
felspathic lodestuff—yielding loz. 9dwts. 9 grs. per 
ton ; Bogan district, in alluvial wash with gold ; about 
60 miles N.W. of Parkes ; Mittagong District, from gold 
and diamond workings eight miles from Mittagong ; 
(Geo. Sur., Dept. of Mines, Sydney). 
PLATINUM, OsmiuM, AND Irtpium—Associated with gold, are 
found on the head waters of the Bogan and Lachlan 
rivers, north-east of Condobolin. I am informed by 
Mr. Harding, of Grafton, that gold, platinum, and 
osmi-iridium occur in the sea sands at Jamba, Clarence 
Heads, and generally in the north ends of the bays and 
reaches along the New South Wales coast. The 
“platinum ” consists principally of osmium and iridium, 
and contains only about 30per cent. of platinum; hence 
it is only worth a few shillings an ounce (L.). 
Piumpaco Ciay.—Mudgee ; (Dept. of Mines Laboratory, 1888). 
PREHNITE. 
PYROMORPHITE. 
This zeolite has been found in the basalt at the 
Prospect reservoir. Some imperfect and small crystals 
were also sent to me by Mr. D. A. Porter for identifica- 
tion, who had obtained them from serpentine in New 
England in 1887. The sp. grs. of two specimens from 
New England were 2°89 and 2:90 (L.); Wollongong 
(Geo. Sur., Dept. of Mines, Sydney). 
Broken Hill Silver Mines ! !, with carbonate of 
lead and zinc ; Burrowa, near Braidwood ; (Geo. Sur., 
Dept. of Mines, Sydney). 
a 
