60 THE MINERALS OF TASMANIA. 



shewed the following forms, most of which were present 

 on each crystal. The letters used are those of Dana: — 



The following table shows some of the measurements 

 and the angles calculated from Dauber's elements: — 



The two prisms (10.3.0 and 5.3.0) were represented by 

 exceedingly indistinct) faces, reflections from which were 

 only dimly visible with the S ocular of the Fuess instru- 

 ment. The first form *S^ (10.3.03) is unrecorded ; the 

 second, T (5.3.0), is enumerated among doubtful forms 

 by Dauber. The remaining forms are in about an aver- 

 age development; but their proportions vary widely in 

 various crystals with either ^ (111) ?' (Ill), or forms of 

 the clinodome zone predominating. This combination of 

 forms is exceedingly like that shown by Dauber (Berichte 

 Akad. Wien., XIII., fig. 93, PI. 11, 1860) on crystal of 

 crocoisite from Berezov in the Ural, which is somewhat 

 surprising considering the widely different paragenesis of 

 the mineral in the two localities. 



95. CuBANiTE (Sulphide of Copper and Iron). 



Much of the cupriferous pyrites occurring at many 

 localities in the western mining fields in reality belongs to 

 this species. It is cubic in crystallisation, although com- 

 monly occurring massive and disseminated. It is much 

 lower in copper and higher in iron contents than chal- 

 copyrite, the empirical analysis given by Dana being S 

 35-4, Cu 23-3, Fe 41-3 = 100. Common at the Mt. 

 Read mines; Mt. Balfour; and Mt. Lyell. 



