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amount of the mineral, and then it was not pure, but mixed with 
quartz and small quantities of Hessite, Altaite, and, possibly, 
Native Tellurium. 
The mineral has, he states, a metallic lustre, and is of reddish- 
white colour, similar to bismuth. He observed one microscopic 
but perfect six-sided plate, but states that the largest portion was 
in indistinct granular and foliated particles with eminent basal 
cleavage. This description does not quite agree with the appear- 
ance of the mineral from Worturpa, but probably the latter is 
purer than that examined by Geuth. 
In some places the telluride of nickel from Worturpa has 
undergone oxidation, staining the surrounding matrix either 
green or yellow. There was not sufficient of the oxidation pro- 
duct present to enable me to determine its composition. But it 
is probably tellurite of nickel. 
IT examined several portions of the mineral in order to ascer- 
tain whether the gold was present in the free state or combined 
with tellurium. On dissolving the mineral in nitric acid, even 
when very dilute acid was used, the gold was always obtained in 
bright spangles, sometimes of considerable size, but even the 
smallest particles showed, when examined under the microscope, 
a bright shining surface. 
Though the gold occurs in the free state in all the samples 
submitted to me, it is highly probable that it was in combination 
with Tellurium, and that the Telluride of gold has undergone 
decomposition. 
It would be of interest to examine samples of the mineral 
obtained from a greater depth in the lode, where there could 
be no possibility of oxidation occurring. 
All the samples were examined for Selenium and Cobalt, but 
none was found present. 
