BY W. F. PETTERD. 19 
62. CHROMITE (Ovwides of Chromium and Iron). 
This mineral is apparently widely distributed throughout the 
north-western portion of the island, but has not been recorded as 
occurring in large quantity. It is always to be found in more or 
less profusion wherever Serpentine occurs, sometimes intermixed 
with that rock in the form of minute crystals, but more often 
as irregular patches of various sizes, which occasionally form 
somewhat extensive masses. 
In the Heazlewood River and its vicinity minute, intensely 
black polished octohedral crystals are plentiful. In favourable 
places in the beds of some of the smaller streams it is quite possible 
to obtain several ounces weight of these crystals ina dish of wash- 
dirt. At this locality it is also fairly abundant in the massive 
form ; in crystallized masses, in ua small vein occurring between 
Serpentine and Quartz, near the River Forth (J. Smith); Pie- 
man River; Meredith Range; Dundas; Asbestus Mountain ; 
very abundant as small crystals in Harman’s Rivulet, Hus- 
kisson River, and at other places. 
63. CHLORITE (Hydrated Silicate of Alumina and Magnesia). 
Occasionally abundant in stanniferous lodes at Ben Lomond 
and Heemskirk; at Bell Mount, west of Mt. Claude, with 
Sphalerite ; as Chlorite Schist it is abundant between Waratah 
and the West Coast. The substance occurring at Bischoff that 
is usually termed Chlorite is a greenish tourmaline rock which 
is peculiar to that locality. 5 
A fibrous radiating variety occurs at Mt. Ramsay and Hamp- 
shire, the former of a pale green and easily decomposable, the 
latter of a darker colour more durable in nature. At the Laurel 
Creek, near Mount Housetop, the mineral occurs as a vein in 
a mineralised dyke ; itis of various colours and much stained with 
Iron Oxide. At the Prince George Mine at Heemskirk in 
sheaf-like aggregations, which cross each other; and sometimes 
radiating ; at the Hampshire Hills as Chloritic Porphyry, in two 
dyke masses running almost parallel, which are traceable for a 
considerable distance. On the north-eastern tin field this mineral is 
distributed, but usually in small quantity ; it occurs asa constituent 
of Protogene, a stanniferous rock, at Ben Lomond and Gould’s 
Country. 
64. CIMOLITE ( Hydrous Silicate of Alumina). 
Occurs as a deposit near St. Leonards, and is often termed locally 
Meerschaum. It is of a smooth compact texture, with a dead 
white colour and subconchoidal fracture. 
65. CALCITE (Carbonate of Calcium). 
The massive form or limestone occurs abundantly at Bridge- 
