NOTES ON SOME MINERALS. 87 



At Tamba Springs, Liverpool Plains District, in veins and 

 deposits in basaltic rocks. Massive, cleavable, no crystals 

 observed. Brownish, yellowish, to colourless. The latter variety 

 (Iceland spar) often in pieces two or three inches in diameter. 



At Dangar's Gully, Nundle, in rhombic crystals in cavities in 

 nodules of magnesian rock. The crystals often arranged in groups 

 of three, and then presenting the form of a nail-head ; also in 

 rosette forms, from the grouping of several individuals. Colour, 

 pale green to greyish. Translucent, gives strong iron reaction 

 with reagents. 



At Ben Lomond (N.E.), crystallized in cavities in basalt, with 

 zeolites. Reddish, yellowish, colourless ; mostly transparent, 

 some opaque. Figures 3, 4, 5 are forms of crystals from this 

 locality. 



Aragonite. 



Three miles north-east from the Big Plain Hotel, on road from 

 Inverell to Warialda, in nodules in basaltic rocks. The nodular 

 masses have a radiated structure, and are at times as much as 

 twelve inches in diameter, generally whitish and translucent or 

 opaque, but some transparent, with a pinkish tinge. 



At Swan Yale, on road from Glen limes to Inverell, one mile 

 north from Swan Vale Post Office, in basaltic rocks, often in 

 nodules, three inches in diameter, some radiated, but most 

 compact and tough. Colour, greyish to nearly white ; translucent. 



Aragonite occurs in radiated transparent yellowish masses in 

 several localities on the Myall Creek Estate, near Bingera. 



Natrolite (Mesotype). 



At Ben Lomond (N.E.), with crystals of calcite, chabazite, and 

 analcite, in radiated or incrusting tufts of delicate acicular 

 crystals, in cavities in vesicular basalt. Colour, snow-white in 

 mass, but individual crystals are really colourless. 



At the Caves, five miles S.E. from the Swan Yale Post Office 

 before mentioned, in rocks similar to those of the Ben Lomond 

 localities ; very plentiful, in acicular crystals, radiated and 

 incrusting, transparent ; aggregates appear snow-white. 



Two miles west from Elsmore, on bank of the Macintyre River, 

 near Inverell Road, in basalt. Compact, radiated, white, opaque. 



Heulandite. 



At Werris Creek, Great Northern Railway, near station house, 

 crystallized in cavities in trappean or basaltic rocks ; associated 

 with stilbite. Crystals small, not more than ^ inch in length ; 

 rare. Colour, pale yellowish white, transparent. 



