470 PHYSIOGRAPHY. CLASS II. 



Char, of Comb. Hemi-pyramidal with inclined faces. 

 Combinations. 1. P oo. *; ^. Sim. Fig. 92. 



2 & 



Consolidated mines, Cornwall. 

 %. P. P + 1. Alte Elisabeth mine, Freiberg. 



3. P oo. P 1. |, |" P + 1. Fig. 109. 



Kurprinz mine, Freiberg. 



2 V 2 T> _ O T> 



4.P -oo. ~ E5, _. i*ip_ 2. P 1. 



4 iP 3 



_A_p. p + i t_Li IZL/ 



z V 3 A J-TA. ^ 7;: 



tHlnrL. . Fig. 178.* Inclina- 



2 2 



tion of /on /over e = 155 35'. * 

 Cleavage, P + l, sometimes very perfect, but in- 

 terrupted ; P oo indistinct. Fracture con- 

 choidal, more or less perfect. Surface P 1 

 generally horizontally streaked. The alternat- 

 ing enlarged faces of P are irregularly streaked 

 parallel to the edges of combination with P + l, 

 and often uneven; the other faces of P are faint- 

 ly but regularly streaked in the same direction, 

 and much more smooth. The remaining faces are 

 almost all smooth, and often possess a high lustre. 

 Lustre metallic. Colour brass-yellow. Streak 



greenish-black, a little shining. 

 Rather sectile. Hardness = 3-5 ... 4-0. Sp. Gr. 

 = 4-169. 



f A fine crystal of this form is in the cabinet of Mr ALLAN. H- 



