BY EDWD. B. LINDON, A.R.S.M. 59 
In the Tinaroo district cassiterite is associated with the following 
minerals :—With turgite, a lower hydrate of iron than limonite, 
probably derived from the decomposition of a chlorite rich in 
iron, at the Black Rock claim, Eureka Creek, in the Comet 
mine, Irvinebank ; and in Blair’s claim, Coolgara ; also with mis- 
pickel in quartz, an association similar to that of the Cornish 
mines, in the North Britain, Irvinebank, and at the Ulster, 
Herberton ; with chlorite very frequently, the red chlorite owing 
its colour to the presence of iron, while the purple variety is due 
to the presence of manganese; with orthoclase felspar in the 
Pinnacle lease, Gregory’s Gully, and in the Soggaorth, Herberton ; 
with kaolin in the Tornado claim, Silverfield, and Great Eastern, 
Eureka Creek ; in micaceous quartz and in crystallized quartz not 
unfrequently ; with fluorspar in the Crcesus, Irvinebank ; in the 
Rose of England, Eureka Creek ; in the Great Northern P.C. ; 
the Nova Scotia; and the Leviathan, Herberton ; with azurite and 
malachite in the Clan Rowland, Eureka Creek, and with tile ore 
and copper carbonates in the Ironclad, Herberton; with iron 
pyrites frequently ; with quartz and steatite in the Great Northern 
P.C. and North Australian, Herberton ; with tourmaline, Day 
Dawn claim, Irvinebank ; with wolfram in the Clan Rowland and 
Rose of England claims, Eureka Creek, and in the Soggaorth 
and Defiance claims, Herberton ; with garnets, Bolton’s Folly, 
Watsonville ; in gneiss, Royal Standard, Gregory’s Gully ; with 
topaz in the Never-can-tell claim, Coolgara, ‘Tinaroo. 
In the Herbertina claim a little bismuth occurs with the ore ; 
in the Freethinker claim, Irvinebank, the ore occurs in quartz 
with galena, and in the Louisa the quartz is in dog-tooth crystals, 
in the spaces between which are galena and a little tin ore. Talc 
accompanies cassiterite in the Orient claim, and in the Wheal 
Vohr the tin was embedded in massive penninite or hydrous talc, 
which can be scratched with the finger-nail ; this matrix is without 
parallel on the fieid (Jack). 
Tin ore replaces mica in Cottais’ claim, the deposit resembling 
granite, and in the Good Friday it occurs in aggregates of minute 
crystals associated with brecciform masses of steatite and noble 
serpentine. Native copper accompanies cassiterite in the Argyll 
mine, and in the Great Western the ore 1s found in black masses 
aggregated round quartz and felspar, large crystals of quartz being 
sometimes enveloped in cassiterite (Jack). 
In the Dreadnought and Nova Scotia claims cassiterite has 
been found in small tetragonal crystals and also as pseudomorphs 
after wolfram. 
