122 



PHYSIOGRAPHY. 



Pseudo-Malachite. 



3. It occurs associated with various ores of silver, several species 

 of Pyrites, and particularly with Native Arsenic and White Iron- 

 Pyrites. 



4. It is found in the Saxon and Bohemian mines, and is particularly 

 abundant at Zacatecas in Mexico. 



PRUNNERITE. (See Calcareous Spar.) 

 PSEUDO- MALACHITE. Hemi-prismatic 

 C op p e r-B ary t e. 



Primary form. Oblique rhombic prism. M on M = 

 142 30'. 



Secondary form. 



Fig. 345. 



on e 



o on o over a 

 a on e 

 /on/ 



141 4' 



112 37 



90 00 



117 49 



Cleavage. Slight indications parallel to b' and e. Frac- 

 ture small conchoidal, uneven. Surface, a and f a little 

 rough, though even ; M smooth but uneven. The rest of 

 the faces smooth and even. 



Lustre adamantine, inclining to vitreous. Color emerald- 

 green, verdigris-green, blackish green, often darker at the 

 surface. Streak green, a little paler than the color. Trans- 

 lucent, often only on the edges. 



