10 
The Queensland Naturalist, 
July, 1921 
Fossilbrook, and at the Tate River, both in gravels, the 
latter being in association with gold. The stone in the 
collection is from Brooklands, and when picked up was 
thought to be a piece of waterworn glass. It has the 
composition of the emerald variety of beryl, and being 
quite flawless, would be an exceedingly valuable stone 
were it the fashionable green instead of blue. 
(Nos. 10, 11). The hyacinth, or red zircon, commonly 
occurs with the sapphires on the Anakie fields, although 
only occasionally are stones found sufficiently decided in 
colour to make them suitable for gems. The cinnamon- 
coloured zircon, called jargoon, is also common with the 
sapphires, and the white colourless zircon is occasionally 
found. Some of the bright red hyacinths are very beauti- 
ful when faceted, and it is difficult to understand why 
this stone should be subservient to the sapphires for 
jewellery purposes. At Mungella, near Mackay, and 
other places, the zircon is very common in the form of 
very small rounded stones in a river gravel, and perhaps 
hundredweights could be obtained there very easily r 
although useless for gem-making. The large hyacinth in 
the collection was found 20 years ago on the Reward 
Claim at Retreat Creek, Anakie, and is portion of a large 
piece which was cut into two gems. The other half was 
used experimentally in reducing the colour by heading 
to bright redness, but the heat was too great, and the 
colour was entirely destroyed. When gently heated the 
hyacinth will become lighter in colour, and when cold 
will gradually return to its original tint, while a little 
greater heat will further lighten it and permanently 
remove some of the colour. The larger hyacinth in the 
collection is brighter in summer than in winter, and in 
very hot weather has a decidedly brighter red colour than 
in cold weather. The small hyacinth (No. 10 s ) was ob- 
tained from Policeman Creek, on the Anakie Field, at a 
position where now the mining town of Sapphire is 
situated. 
(No. 22). White topaz is a somewhat common 
mineral throughout Eastern Queensland, more particu- 
larly in the sapphire leads ( at Anakie, in the tin gravels 
at Stanthorpe, and in some of the tin and wolfram lodes 
on the Herberton and Chillagoe mineral fields. The stone 
is usually colourless, only rarely having a yellowish tint, 
but very clear stones are rather uncommon. Occasionally 
a specimen is found which will cut a very white gem, free 
from any mistiness or cloudiness, and then it approaches 
