THE MINERALS OF NEW SOUTH WALES. 191 



Arragonite occurs in vesicular basalt at Cherry-tree Hill near 

 Mudgee, and groups of radiating crystals several inches in length 

 are met with in a similar rock at Inverell ; Jordan's Hill, Cudge- 

 gong; at the Brick Kiln, Rock Flat, in radiate columns or 

 crystals of variegated green and white colours. 



Calcareous Tufa, or Fresh-water Limestone. — At Burragorang, 

 Quialago Creek, Goulburn Plains, and at Newstead Station, New 

 England. 



Calcite. — Iceland spar. 



Chem. comp. : Calcium carbonate. Hexagonal system. Some- 

 times well-developed crystals are met with. The usual forms are 

 rhombohedra and their combinations, also combined with the termi- 

 nal pinacoid or o.p. plane, and occasionally scalenohedra. I have 

 not as yet observed the prism amongst the New South Wales forms. 



The localities for calcite are extremely numerous, as it is met 

 with wherever limestone occurs, and is a common substance in 

 mineral veins. 



Large well-developed flat rhombohedral crystals of calcite occur, 

 associated with quartz, in the joints and cavities which exist in 

 the basalt of the Pennant Hills, near Parramatta. It is also 

 met with in the quartz veins in association with and as the matrix 

 of gold, as at Gulgong and other places. It is sometimes present 

 in the joints in sandstone, as at the Cataract River. 



Opaque white calcite occurs at Capertee. 



Marble. — Several beds of very fine marble, or crystalline lime- 

 stone, occur in different parts of the Colony, as at Wollondilly, 

 whence one of the marbles, used in paving various public buildings 

 in Sydney has been obtained — as the great hall at the University, 

 and at the Post Office. Much of the Wollondilly so-called "white 

 marble" is of a creamy tint, variegated with pale red and light 

 blue streaks. A slate-coloured marble, used in the same buildings, 

 is brought from Marulan, near Goulburn. There is a beautiful white 

 marble near Bathurst, and a brecciated slate-coloured one streaked 

 with white at Wallerawang and other spots between the above 

 two places. Beautiful marbles occur at Mudgee and Orange ; also at 

 Wellington, celebrated for its caves. At Bangalore, on the Goul- 

 burn Plains, there is found a white crystalline marble. At Yass. 

 Queanbeyan. Good grey and white crystalline marbles are found 

 along the banks of the Murrumbidgee. There are many caves in 

 the limestone between the Belubula River and the Conomodine 

 Creek, in the Orange district, containing animal remains, some of 

 which are of considerable size. Blue-grey limestone at Warialda. 

 The outcrops of small seams of grey crystalline limestone or marble 

 are seen exposed in the Minumurra Creek, near Jamberoo, inter- 

 bedded with the coal, shale, and sandstones of that district. 



