28 UNRECOHDRD AND OTHER .MINKRALS 



45 MiLLERiTE. — (Sulphide of 7iick(l.) 



In the characteristic capillary patches in quartz, 

 with pentlandite — near the Colebrook Mine. 

 Ringville. 



46 MONAZITE. — (Phosphate of cerium metals.) 



This mineral has been obtained in a fine granular 

 form in alluvial at the following localities, in ad- 

 dition to those quoted in the " Minerals of Tas- 

 mania " : — Stanley River, South Esk Tin Mine 

 (Ben Lomond), Briseis Tin Mine (Derby), the 

 Pioneer Tin Mine (Mt. Stronach), and at the 

 Khaki Mine at the foot of the Meredith Range). 



47 Natrolite. — (Hydrous sodium and aluminium sili- 



cate.) 

 Somewhat abundant in massive pure white masses 

 and pockets, which often exhibit distinct rhombic 

 crystals agglutinated together, Nephelinite, 

 Shannon Tier. 



48 Nephelite. — (Ortho silicate of sodium, potassium, and 



aluminium..) 

 In microscopic crystals, as an essential constituent 

 in the nephelinite of the Shannon River. 



49 NoNTRONiTE. — (Hydrated iron silicate.) 



A green variety of chloropal. Occurs of a pale yel- 

 low-green colour. Middlesex. 



50 OsMiRiDiUM. — (Iridium and osmium in varying pro- 



portio7is.) 

 A fine nugget of this substance was recently obtained 

 in the Whyte River, near its junction with the 

 Pieman. The specific gravity was 19-5, and 

 weight 60 grains. 



51 Pectolite. — (Metasilicate of sodium and calcite.) 



Occurs in fibrous radiating bunches of a pure white 

 silkv subvitreous lustre — Upper Emu River. W. 

 R. Bell. 



52 Penninite. — (Basic silicate of magnesium, aluminium, 



and iron.) 

 In dark, almost olive-green, masses and crystals, the 

 latter sometimes over |'/ across. It is invariably 

 associated with quartz — Tharsis Copper Mine. 

 Mt. Lyell. 



