NOTES on AZURITK CRYSTALS from BROKEN HILL. 



By Miss P. Oohen, b.a., b.sc, 



Junior Demonstrator in Geology and Mineralogy, 



University of Sydney. 



With Plates XXXVI, XXXVII. 

 [Read before the Royal Society of N. S. Wales, November 2, 1910.-] 



Azurite from Broken Hill -The crystals dealt with in 

 this paper were, with one exception, obtained from the 

 specimens in the Hugh Dixson Collection of Minerals from 

 Broken Hill, lately presented to the University of Sydney. 

 Some azurite crystals from the same locality have already 

 been described by Dr. Const Steiner, 1 but in view of the 

 wealth of material in the above collection it seemed desir- 

 able that they should receive further investigation. The 

 crystals measured were taken indiscriminately from several 

 hand specimens, and for the purposes of description may be 

 divided into two types. All are small crystals and the faces 

 possess bright, well-relle.-ring surfaces, with the exception 

 of a few which are invariably striated. I have also 

 measured a third type from Broken Hill, kindly placed at 

 my disposal by Or. Anderson, Mineralogist of the Australian 

 Museum, Sydney. 



Type I. 



Of this type four crystals were examined. Three of these 



are small, measuring approximately "75 x 4 x 1*5 mm. in the 



direction of the u, b and c axes respectively. The fourth, 



however, is somewhat larger. All are elongated in the 



eoid. The following forms were observed a (100), </> (201), 

 e (001), (101), »/ (302), v (201), m (110), w (120), h (221), 

 1 (023), f (Oil), p(021), s(lll), u(223), fc(221). 



1 Ann. Mas. Nat. Hung., iv, 1906, p. 293-8. 



