PHYSIOGRAPHY. 



Cobalt Vitriol Colurnbite. 



139 



2. Analysis. 

 By KOPP. 



Oxide of cobalt . . . 38-71 



Sulphuric acid . . . 19-74 



Water . . . 41-55 



3. 'it occurs in the rubbish of old mines at Bieber in the neighborhood 

 of Hanau. 



(See Pyroxene.) 



COCCOLITE. 



COLLYRITE. 



Massive : composition impalpable. Color white. More or 

 less translucent. Fracture conchoidal, with resino-vitreous 

 lustre. Easily impressed by the nail, and shining when cut 

 with the knife. Adheres strongly to the tongue. 

 1. Infusible before the blow-pipe, affording water by calcination, and 

 at the same time becoming pulverulent. Forms a jelly in the acids. 

 2. Analysis. 

 By KL.APROTH, 

 from Chemnitz. 



Silica . . . 14-0 



Alumina . . . 45-0 . . . 44-5 



ttater .. . . 42-0 . . . 40-5 



3. It occurs in narrow seams in porphyry at Schemnitz, in the lead 

 mines of Esquera in the Pyrenees, and at Weissenfels in Saxony. 



COLOPHONITE. (See Garnet.) 

 COLUMB1TE. Pyramidal Barjte-Ore. 



Primary form. Right rectangular prism. 



Secondary form. 

 P on M orT - 90 OOO Fi ff , 144. 



By BERTHIER, 



from Esquera. 



15-0 



