70 



Case 64. 1628, Butler Lode : one of the few lode tin deposits that have 



been worked to any extent. A large Mock of thi^ ore is exhibited 

 on a table near the door. The tinstone occurs in quartz, and is 

 associated with arsenical pyrites. 



1621, Mole Tableland : fine-grained granite {eiirite) traversed 

 by strings of tinstone. 



7958, Torrington Lode : a good instance of a felspathic rock 

 thoroughly impregnated with tinstone. 



1649, Ding Dong, near Deepwater : tinstone in greisen. 



7955; Bridge Creek : tinstone associated with chlorite — the 

 mineral that gives the deep green tint to the ore. 



7948, Back Creek : tinstone with wolfram, which can be easily 

 recognised by its long glistening cleavage faces.* 



7949, Emerald Mines, Emmaville : tinstone in quartz, with 

 green beryl (see p. 13 and case 49). 



1677, Rockvale, Arinidale : large ironstained felspar crystals, 

 in which tinstone is imbedded. 



801, Emerald Mines, Emmaville : crystals of tinstone with 

 fluor in soapstone. 



7932, JSTewstead : tinstone in greisen. 



9267, Elsmore : tin-bearing greisen. The ore occurs in pipes 

 from three to four inches in diameter, which do not go down 

 far. "Wolfram occurs in the same deposits. 



7940, Ph. Swinton, co. Hardinge: granite traversed by very 

 conspicuous veins of black tinstone. 



1562-3 and others from the Giant's Den Mine, Bendemeer. 

 The ore here occurs with quartz in greisen, and is interesting 

 from its association with tourmaline. 1562 shows radial groups 

 of dark-green tourmaline. f 



* On the presence of wolfram in tin ores see page 72. 



t Tourmaline can Tje distinguished from tinstone by («) not iDeing so heavy 

 (specific gravity about 3 only) ; (?*) freciuently occurring in bundles of needle- 

 like crystals; (o) crushing to a greenish powder; (rf) being easily fused before 

 the blowpipe. 



