64 MINERALS OF TASMANIA. 
quantity at St. Mary’s, and near Circular Pond Marsh (W. R. 
Bell). 
222. SERPENTINE (Hydrated Silicate of Magnesia). 
This mineral occurs as a rock mass of considerable extent. Its 
normal colour is green of many shades, but almost every known 
variety of the substance, both in colour and in structure, has been 
obtained in more or less quantity. The mineral Olivine is supposed 
to be transmutable to Serpentine under certain conditions. At the 
Heazlewood and vicinity it occurs in considerable quantity, often 
containing a perceptible amount of Nickel oxide, which gives it a 
bright apple-green colour, in which case it approaches that from 
New Caledonia, which is worked as an ore of Nickel. Along the 
banks of the Heazlewood River and some of the smaller streams 
much of the Serpentine often contains large quantities of minute 
intensely black crystals of Chromic Iron, and more rarely large 
amorphous bunches of the same mineral. JBrucite, Schiller-spar, 
and narrow bands of Chrysolite also occur with it as accessory 
minerals ; at Anderson’s Creek and neighbourhood extensive masses 
of this rock exist, in many places containing a considerable quantity 
of asbestiform Chrysolite and Steatite; north of Trial Harbour it 
often contains long fibrous Asbestos, and is connected with an 
extensive bed of remarkably pure Talc; also occurs at Mount 
Ramsay, Pieman River, Mount Claude, Clayton Rivulet, and at 
the Parson’s Hood Mountain; at Dundas a semi-serpentized 
Hornblende occurs intermixed with Bastite, and at the same 
locality a purple-coloured form is common, often containing 
disseminated Magnetite and Chromite. 
223. STRONTIANITE (Carbonate of Strontia). 
Found in small veins and pockets, usually of a white satin 
appearance, at the Hampshire Silver mine (W. R. Bell). This 
species is not known to occur at any other locality in the island. 
It was obtained irregularly mixed up with lode-matter, with 
Fluor-spar, Apatite, and several minerals that are like it, almost 
peculiar to this interesting locality. “Mr. Gould recognised 
Strontium associated with heavy-spar in some minerals that I 
discovered at the Forth River.’”—(James Smith). 
224, SEPTARIA (Mixed amorphous Carbonates of Lime and 
Iron with more or less Silica). 
Rounded and occasionally flattened concretionary nodules, 
which are sometimes of considerable size—up to two feet in length 
—of a dirty white to brown colour. They have almost invariably 
a strong radiated structure. 
Hampshire Hills (W. R. Bell). 
225. TASMANITE. 
A grey earthy to arenaceous shale more or less impregnated 
