PHYSIOGRAPHY. 



Levyne Libethenite. 



11 



With salt of phosphorus, it yields a transparent globule, which contains 

 a skeleton of silica, and becomes opake on cooling. 



2. Analysis. 



By BERZELIUS. By CONNEL. 



48-00 - - - 46-30 



20-00 - - - 22-47 



8-35 - - - 9-72 



0-40 - -" - 0-00 



0-41 - - - 1-26 



2-75 - - - 1-55 



0-00 - - - 0-77 



0-00 - * - 0-19 



19-30 - - - 19-51 



Silica 



Alumina 



Lime 



Magnesia - 



Potash 



Soda 



Oxide of iron 



Oxide of manganese - 



Water 



3. It occurs at Dalsnyhen in Faroe ; in Ireland, and in the island of 

 Skye, with Heulandite, in the vesicular cavities of amygdaloid. 



LIBETHENITE. Diprismatic Copper-Baryte. 

 Primary form. Right rhombic prism. M on M=l 10. 

 Secondary form. 



Fig. 279. 





x on x 

 P on c 

 a on a' 

 c on c 

 c on e 



110 00'? "| 

 126 10 

 95 15 



15 



10 



S PHILLIPS. 



121 

 149 



Cleavage, parallel with P and M : the former distinct. 

 Fracture conchoidal, uneven. Surface of P very smooth 

 and even ; M striated parallel to its edges of combination 

 with P. 





