36 MINERALS OF TASMANIA. 
available prior to 1860; from this year to the end of 1892 the total 
quantity obtained is estimated at 271,106 oz., valued at about 
£2,666,608, but large quantities are known to have left the colony 
by private hands from the alluvial districts generally, but more 
particularly from the western fields. r 
Decennial Return Showing Gold Produced. 
Year. Ozs. Value. 
ES 
TES Sebodo sce aces nncacensteachtess 46,577 176,442 
dU cte 6 De ei Oe Ce 42,339 160,404 
EB Gdns acdsee vcceovaes ceuees 41,240 155,309 
Pees secs teal lee ocectel es 31,014 117,250 
My Bee is diated aSeewesicdicelce 42,609 158,533 
ES ls otecad nediateassiadses'siasinate 39,610 147,154 
DS Bee sane Sctoiioe's sh vleicae dudes se 32,332 119,703 
OO cc oedddip senesced ewes os 23,451 87,114 
eR OE ie Patra tice, oc no'ee aiwierd’s 0,0 010 39,203 149,816 
Nesey Seapine duct a'cdwuia ds dscns 43,278 162,292 
_ (The Returns obtained from the Tasmanian Official Record, 1892, and 
the Mines Department.) 
102. GENTHITE (Nickel Gymnite, Hydrated Silicate of 
Nickel and Magnesia). 
A few small specimens of a hydrated Silicate of Nickel, show- 
the clear characteristic apple-green colour, have been obtained in 
the workings of the Heazlewood Silver-lead Mine. They 
occurred as thin incrustrations, and apparently belong to this 
species, or at least to an analogous form. 
103. GYPSUM (Sulphate of Lime or Selenite). 
Abundant on the Grunter Hill, Upper Mersey River, in veins 
occurring in blue mountain limestone; the radiating cubical 
masses are of great size and iridescent appearance (W. R. Bell) ; 
Circular Pond Marsh, near Gad’s Hill; in small lumps near 
Launceston ; Gipps Creek, Ben Lomond; Mt. Horror; Zeehan; 
at Trial Harbour this is often met with forming radiating bunches 
attached to tale. 
104. GLAUBER SALT (Sulphate of Soda). 
_ On the floor of the caverns, intermixed with Native Alum as a 
powder of a dirty-white colour. 
Alum Cliff; River Mersey, near Chudleigh. 
104a. GIBBSITE (Terhydrate of Alumina). 
A white incrusting mineral with an indistinct fibrous structure. 
