160 



PHYSIOGRAPHY. 



Red Silver. 



directly above them, to obtuse scalene dodecahedrons; the 

 planes h, and the three sets of planes around g, I and the 

 three elongated planes between h and d, all tend to acute 

 scalene dodecahedrons; / and n lead to regular six-sided 

 prisms. 



Fig. 381. 



P on z (c. g.) - 172 00' 



P onh - 141 50 



PonZ - 158 22 



d on d (c. g.) - 125 



h on h - 134 40 



n on n - - - 120 



Cleavage parallel with P, pretty distinct in some varie- 

 ties. Fracture conchoidal. Surface, /and n striated ver- 

 tically ; P, z, and g*, and most of the adjoining faces streak- 

 ed parallel to their common edges of combination. 



Lustre metallic-adamantine. Color, iron-black, lead- 

 grey, sometimes approaching cochineal-red. Streak, coch- 

 ineal-red, in shades corresponding to the color. Translu- 

 cent to opake. 



