CHARACTERISTIC. CLASS II. 



H. = 3-5 ... 6-0. 

 G. = 2-0 ... 2-5. 



Pyramidal : cleavage axotomous, eminent. 



H. = 6-0 : tessular. 



1. TRAPEZOIDAL. Tessular. 



Cleavage, hexahedron, dodecahedron, imperfect. 

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

 G. = 2-4 ... 2-5. 



Leucite. ii. 224. 



2. DODECAHEDRAL. Tessular. 



Cleavage, dodecahedron distinct. 

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

 G. = 2-25 ... 2-35. 



Sodalite. ii. 225. 



3. HEXAHEDRAL. Tessular. 



Cleavage, hexahedron, imperfect. 



H. = 5-5. 



G. = 2-0 ... 2-2. 



Analcime. ii. 227- 



4. PARATOMOUS. Prismatic. 



Cleavage, P. Pr + co. Somewhat easier Pr + ep. 



Imperfect. 

 H. = 4-5. 

 G. = 2-3 ... 2-4. 



Harmotome. ii. 229. 



5. RHOMBOHEDRAL. RhombohedraL R = 94 46'. 



Cleavage, R. 

 H. = 4-0 ... 4-5. 

 G. = 2-0 ... 2-1. 



Chabasite. ii. 232. 



6. DIATOMOUS. Hemi-prismatic. P + co = 86 15'. 



Cleavage, Pr -f oo. Traces of Pr + o. 

 H. unknown. 

 G. = 2-3 ... 2-4. 



Laumonite. ii. 234. 



