ORDER VIJ. GENERA AND SPECIES. 433 



H. = 5'5 ... 6-5. 

 G. = 1-9 ... 2-2. 



Opal ii. 332. 



4. EMPYRODOX. Grains ... massive. 

 Cleavage, none. 

 H. = 6-0 ... 7-0. 

 G. = 2-2 ... 2-4. 



Fusible Quarts. J. ii. 337. 



VII. AXINITE. Prismatic. 



Lustre pure vitreous. 

 H. = 6-5 ... 7-0. 

 G. = 3-0 ... 3-3. 



1. PRISMATIC. Tetarto-prismatic. 



Cleavage, two faces, one of them more distinct. In- 

 clination = 101 SCK. 



Axinite. ii. 341. 



VIII. CHRYSOLITE. Prismatic. 

 Lustre pure vitreous. 

 H. = 6-5 ... 7-0. 



G. = 3-3 ... 3-5. 



1. .PRISMATIC. Prismatic. Pr = 80 53'. (Pr + co) 3 = 

 130 2'. 



Cleavage, Pr + 05. Traces of Pr + 09. 



Chrysolite. ii. 345 . 



IX. BORACITE. Tessular. 



H. ^ 70. 



G. = 2-8 ... 3-0. 



1. TETRAHEDRAL. SemUessular, with inclined faces. 

 Cleavage, octahedron, imperfect. 



Boradte. H. 347. 



VOL. I. 2 E 



