ITortiiem 

 Localities. 



Case 64. tinstone are of remarkable purity and exceptionally low specific- 

 gravity (very slightly above 6). (For a large specimen, see 

 case 126.) 



7977, Jervis Bay : deposits of tin-bearing beacb-sand such as 

 this occur at several places along the coasts of New South Wales. 



1872, 7971, and 7241, from Grenfell, Cooyal, and Binda res- 

 pectively, show the variety of stream tin sometimes known as- 

 " toad's-eye." 



Deposits of tinstone have been frequently prospected at 

 Pullitop, near Wagga. Unfortunately, both in the alluvial and 

 in the lode, the tin is associated with wolfram, sometimes in 

 almost equal proportions.* (7696.) 



Another locality where tin deposits have been developed to 

 some extent is Gundle, in the Kempsey district. 1743, 1744 

 show the stream tin ; 1681 the lode. The ore occurs with quartz 

 in granite country. 6729, in the end compartment of case 62, 

 is a beautiful specimen of the Gundle ore, showing green and 

 blue iiuor and crystallised quartz. 



The auriferous sands of the Northern beaches frequently 

 contain a fair percentage of tin (see page 16). 10203 : tinstone 

 concentrated from sand from the Xorthern Beaches. 



p fifi -^ large part of case 66 is devcted to the display of stream tin 



Stream Tin from New England : specimens from other localities have been 

 ^^^v di ^li'63-dy referred to. The collection is a yery complete one^ 

 representing many deposits now worked out. The first half of 

 the case contains stream tin cement, the word " cement " being^ 

 applied ^s in the case of alluvial gold (see page 21). Many o£ 

 the alluvial tin deposits (leads), like those of gold, are ancient 

 water-courses that have been long since filled up, and sometimes 

 deeply covered by the basalt poured down the valleys from the 

 volcanoes that were so active in Australia during the Tertiary 

 epoch of geological time. 3306, Emmaville : pipeclay found 



* Wolfram (see page 92) is a valuable mineral in itself, but, owing to its specific gra-s'ity 

 being- about the same as that of tinstone, the two minerals cannot be separated b.y washing. 

 Wolfram can be readily distinguished from tinstone, since it can be easily scratched with u 

 knife-blade, while tinstone cannot. 



