PHYSIOGRAPHY. 



Yellow Copper Pyrites. 



283 





2. Analysis. 

 By ROSE. 



Sulphuric acid .... 

 Oxide of iron .... 

 Lime .... 



Magnesia .... 



Water .... 



Silica .... 



2. It is found with the above. 



31-73 



28-11 



091 



0-59 



36-56 



1-43 



YELLOW COPPER PYRITES. Pyramidal 

 Chlorone- Pyrites. 



Primary form. Octahedron with a square base. P on 

 P"=102 55'. 



Secondary forms. 



Fig. 484. Fig. 485. 



Pon I 

 I on I 

 I on I 1 " 

 P on P" 



141 



110 



71 



125 



15' 



00 

 10 

 30 



PHILLIPS. 



M 



Fracture conchoidal, more or less perfect. Surface, 

 P streaked, parallel with the base ; the alternating faces 

 enlarged, faces of / are irregularly streaked. The re- 

 maining faces are almost all smooth, and often possess a 

 high lustre. 



Lustre metallic. Color brass-yellow. Streak greenish- 

 black, a little shining. 



