

162 PHYSIOGRAPHY. 



Cupreous Manganese Datholite. 



Lustre resinous. Color bluish-black. Streak unchan- 

 ged. Opake. 



Hardness =3-5. Sp. gr. = 3.197 . . . 3-216. 



1. Before the blow-pipe, it becomes brown, but is infusible. To bo- 

 rax and salt of phosphorus, it communicates the colors of copper and 

 manganese. 2, Analysis. 



By LAMPADIUS. 



Black oxide of manganese . . 82-00 

 Brown oxide of copper . . 13-50 



Silica . . 2-00 



BERZELITJS found it to contain a considerable quantity oft water, 

 3. It occurs in the tin mines at Schlaggenwald in Bohemia, and at Ar- 

 marilla in Chili. 



CYANITE. (See Kyanite.) 



CYMOPHANE. (See Chrysoberyl.) 



CYPRIN. (See Idocrase.} 



DAVYNE. (See JYcphiline.} 



DATHOLITE. Prismatic Dystome-Spar. 

 MOHS. 



Primary form. Right rhombic prism. M on M' = 



102 30'. 



Secondary forms. 



Fig. 156. Fig. 157. 



P on s 

 P on a 



Seiseralp. 



122 00' 



115 45 



177 04 



