60 CATALOGUE OF MINERALS ,j 
In the Stanthorpe district the large amount of stream tin that 
has been found is very notable. Mr. R. L. Jack says that in this 
district two distinct types of tin-bearing rocks are met with—quartz 
reefs and igneous dykes. The reefs are best developed on the 
left bank of Quart-pot Creek, the quartz being highly crystalline 
(sometimes smoky), with wolfram and sometimes with moderately- 
sized crystals of tin ore, the latter almost always confined to faces 
and joints. The dykes are composed of granular quartz, fine 
scaly lithia-mica, and small crystals of tin stone, forming a rock 
much resembling the stanniferous greisen of Saxony. ‘They seem 
to have been erupted in a molten state (bringing up the tin oxide 
with them) among fissures in the granite. Further, Mr. Jack 
strongly recommends a vigorous search of these dykes, as likely to 
lead to the discovery of permanent tin-bearing matrix. 
Stream tin has been found at Pikedale and Quart-pot Creek, 
both in the neighbourhood of Stanthorpe ; on the Tate River ; 
at Spring Creek, Cloncurry ; at Warroo, near Gladstone ; in the 
bed of Running Creek, near Great Star River, mixed with small 
magnesia alumina garnets and yellow topazes; in Granite Creek, 
near Maytown, in the Palmer district; at Herberton; and is 
reported as occurring in the Burnett district. At Pikedale and 
(Quart-pot Creek and in Granite Creek, near Stanthorpe, the stream 
tin was often accompanied by a little gold, and other associates of 
the Stanthorpe tin-drift are topaz, diamonds, sapphires, zircons, 
garnets, beryl, and magnetite. 
The “ruby” and “amber” varieties were commonly found at 
y oe, ; 
Stanthorpe, and ‘ wood tin” has been found on the Perry River, 
Gilberton. 
RutiLE— Comp. Ti O,, but generally containing iron. 
Specimens of rutile in quartz were brought back by Hann’s 
Northern Expedition, but I am unable to ascertain the exact 
locality. 
PyROLUSITE—Comp. Wm QO,. 
Pyrolusite occurs sparingly in the ironstone of Mount Morgan ; 
also in some quantity in a reef near the junction of Didcot and 
Chowey Creek, near Maryborough. It has also been noticed by 
Mr. R. L. Jack with hematite on Police Creek, a tributary of the 
Gregory River. 
