396 



CHARACTERISTIC. CLASS II. 



VI. ORDER. SPAR. 



Non-metallic. 



Streak uncoloured ... brown, blue. 



H. = 3-5 ... 7-0. 



G. rr 2-0 ... 3-7. 



Tessular : G. = 3-0 and less. 

 Rhombohedral : G. 2-2 and less ; or H. 



= 6-0. 

 H. = 4-0 and less : cleavage monotomous, 



eminent. 

 H. above 6-0 : pearly lustre ; G. under 2-5 



or above 2-8. 



G. above 3-3 : forms hemi- or tetarto-pris- 

 matic; or H. = b'-O; no adamantine 

 lustre. 



G. = 2-4 and less : not without traces of 

 form and cleavage. 



