Fig. 134- 

 Chrysoberyll. 



d. e. f. g. 



Fig. 135. 



Basal sections of: a, b, c: Aragonite; d: Bromlite; e: Cerussite; /.' Chlorite; 

 g: Potassium-sulphate. 



of its molecular structure, appears to be that of biaxial crystals. 



In fig. 135 basal sections are reproduced of some compound twins 



of aragonite: CaC0 3 ; witherite: BaCO s ; barytocalcite or bromliU: 





