SERPENTINE. 151 



Lustre metallic. Colour silver- white. Streak shin- 

 ing. 



Soft. Malleable. 



It acquires negative electricity by friction. It inelts 

 easily upon charcoal into a grey malleable globule, giving 

 out a strong smell of selenium, and consists of selenium 

 and copper. It has been hitherto exclusively found in the 

 Skrickerum copper mine, in Smaland in Sweden. 



SERPENTINE. 



Serpentine. JAM. Syst. Vol. II. p. 292. Man. p. 36. 

 Serpentine. PHILL. p. 97- 



Prismatic. P = 139 34', 105 26',, 88 26'. VoL I. 

 Fig. 9. AP. 



a : k : c = 1 : V 4-3 : J 1-4. 



Simple forms. P (P); (Pr) 3 (n) ; (?r +o>) 

 (d) = 82 27 ; ?r (o) = JL28 31' ; ?r + 1 (r) 

 = 92 4'; Pr + oo (ft) ; Pr + oo (s). 



Char, of Comb. Prismatic. 



Comb. 1. ?r. P. (?r + oo) 3 . jfr + 00. Pr + oo- 



Sim. Fig. 25. 



2. Pr. P. Pr + 1. (Pr) 3 . (?r+oo) 5 . ?r + QD. 

 Pr + oc. Fig. 33. 



Cleavage. Traces of Pr + oo and of (Pr -f- cr>) 5 , 

 apparent only in a strong light. Fracture flat 

 conch oidal, splintery, uneven. Surface, almost 

 dull, very little glistening, but rather even. 



Lustre resinous, indistinct, low degrees of intensity. 

 Colour dark blackish- and leek-green, seldom 

 lighter shadesof oil-green and siskin-green colours, 

 none of them being bright ; they pass into yel- 



