CAS SITE RITE CRYSTALS. 65 



NOTES ON OASSITERITE CRYSTALS from the NEW 



ENGLAND DISTRICT, NEW SOUTH WALES, 



and STANTHORPE, QUEENSLAND. 



By Miss Marie Bentivoglio, b.Sc, 



Science Research Scholar, Sydney University. 



(Communicated by Assistant-Professor L. A. Cotton, m.a.. ds c .) 



With Plate I and 12 Figures. 



[Read before the Royal Society of N. 8. Wales, July 6, 1921.'] 



OASSITERITE. 



The cassiterite crystals dealt with in this paper were 

 obtained from various New England areas in New South 

 Wales, and in one instance from Stanthorpe, Queensland. 

 The majority of the crystals described were chosen from a 

 hand specimen of felspathic vein material, very rich in 

 cassiterite, from the Stannum district. For this unique 

 specimen I am indebted to Assistant-Professor L. A. Cotton, 

 who kindly placed it at my disposal. The investigation of 

 these tinstone crystals constitutes the first part of the 

 present paper.. This is followed by notes on some well- 

 formed crystals, exhibiting unusual features, from Pheasant 

 Creek, Stanthorpe, and Mandoie Station in the Ashford 

 district — these I owe to the kindness of Dr. Anderson, 

 Director of the Australian Museum, in placing them at my 

 disposal. Considerable work has already been done on the 

 crystallography of cassiterite from the New England 

 district, 1 but owing to the wealth of material at hand and 



1 Dr. C. Anderson : Rec. Aust. Museum, Vol. VI, Pt. 5, 1907, pp. 404 - 

 407 ; Vol. xni, No. 1, 1920, pp. 22-25. 



E— July 6, 1921 



