190 



PHYSIOGRAPHY. 



Euclase. 



EUCLASE. Prismatic Emerald. MOHS. 



Primary form. Right oblique-angled prism. MonT= 

 130 50'. 



Secondary form. 



Fig. 175. 



P on M or T 

 M on M or T 

 bl on M or T 

 62 on M or T 



P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 

 P 



on c 

 on d 

 on el 

 on e2 

 on c3 

 on e4 

 on c5 

 on c6 

 on c7 

 on e8 

 on c9 

 on clO 

 on ell 



103 C 



100 



123 



108 



130 



112 



139 



165 



143 



162 



169 



143 



105 



140 



148 



115 



Cleavage, highly perfect, and very easily obtained par 

 allel to P ; less distinct parallel to T. Fracture perfect!; 

 conchoidal, and very easily obtained. Surface, the face 

 between T and P streaked parallel to their common inter 



section. 



