July, 1921 
The Queensland Naturalist. 
13 
pseudomorphic change from limestone into silica. The 
specimen in the casket is from Camooweal, on the border 
of Western Queensland, and was found in a belt of 
limestone country extending from this locality westerly 
across the border to beyond Anthony’s Lagoon, in the 
Northern Territory. The stones are collected mostly by 
travellers passing through this part of Australia, and are 
fashioned by our lapidaries into sleeve links, brooch 
atones, anil watch-chain pendants. They are very suitable 
for such purposes in being nicely banded, and very hard; 
they polish perfectly. 
(No. 29). Agates are of common occurrence about 
the Little River tin fields, near Croydon, and at the Percy 
River, at Oilberton, on the Etheridge goldfield. They are 
also found in a number of other places, but only occa- 
sionally are the stones, other than from the above 
localities, of any use for ornamental purposes. The speci- 
men in the collection is from Little River, the deposit 
from which it was obtained being an immense accumula- 
tion of pebbles of all sizes, derived from the disintegration 
of vesicular basalt, the cavities in the rock being the 
moulds in which the various coloured bands of chalcedony 
were deposited to make up the agate structure. Some 
agates ar? naturally coloured, but the most useful are 
those which can be artificially tinted by 4 ‘pickling” in 
colouring solutions. 
(No. 28). Green jasper is only known to occur at the 
Great Australian copper mine at Cloncurry, one of the 
earliest mines opened up on this field. It is found in 
association with chalcedony, malachite, and azurite, and 
probably has been formed by the silicifi cation of the 
malachite. The mineral is very hard and tough, and is 
attached to a dark matrix, and sections with the dark 
matrix make very pretty effects when polished for brooch 
stones and other articles of jewellery. , 
(No. 27). Red jasper is of common occurrence 
in the serpentine areas about the Rockhampton district, 
and is also found in association with ironstone and other 
mineral deposits. The specimen in the collection is from 
the old copper mine close to a serpentine area at Mount. 
Warminster, at Cawarral, and probably has been formed 
as a decomposition product of sulphide ores. 
D. OTHER STONES. 
Other stones not included in this collection are very 
numerous, of which the following might be mentioned: — 
Rose stone or rhodonite (Warwick) ; cross stone or 
