July, 1921 
The Queensland Naturalist. 
II 
the diamond in lustre. The stone in the collection is from 
Stanthorpe. 
(No. 21). The blue topaz in the collection was ob- 
tained from the Tate River tin mines at Fisherton, in the 
Chillagoe district. The specimen is typical of those 
occurring 'n the gravels with the white topaz, but, while 
very large waterworn pebbles and crystals are not 
uncommon, blue stones of a decided colour are rare. The 
blue topaz also occurs in the tin gravels at Stanthorpe,. 
and occasionally in the sapphire wash at Anakie, in 
association with colourless topaz. Yellow topaz has not 
been fqund in Queensland. 
(No. 20). Garnets of a brownish red colour are to- 
be found in numerous localities on the gold, tin, and 
sapphire fields, and also in many places unaccompanied 
by any of these minerals. At Jordan Creek., on the Russell 
goldfield, near Cairns, garnets of several shades of colour 
are to be observed associated with rubies and other 
corundum varieties, and deep red garnets occur at 
Anakie, while at Lowood, an agricultural area near 
Ipswich, similar stones are found on the ploughed fields 
after rain. A recent discovery of this stone has been 
reported from Noosa, on the coast. The specimen in the 
collection comes from Lowood. Essonite, the brown 
garnet., and grossularite, the green garnet, are found in 
the garnet rock masses about Chillagoe, but stones suit- 
able for gems are very rare. At the Ulam marble quarries, 
between Rockhampton and Gladstone, exquisitely beau- 
tiful green garnets are observed in white marble, but 
they are very minute. 
(No. 6). Olivine. The specimen in the casket is from 
Toowoomba, where there is an area of basalt containing 
large quantities of this mineral, although pieces large 
and clear enough for cutting are rare. The colour is 
usually a light greenish yellow, and rarely a decided 
grass green. 
C. SILICA VARIETIES. 
(No. 17). Amethyst, the purple variety of rock 
crystal, is 5 common stone in the State, although seldom 
occurring sufficiently clear and deep in colour to be con- 
sidered a gemstone. This specimen is from the Don River, 
near the coastal town of Bowen, and the good effect 
produced by cutting it into a gem shows that a possibility 
exists of obtaining material from this locality sufficiently 
good for gem purposes. 
