II ABIT. 



FIGURE 9. Striations on wedge-shaped crystals of habit 1, causing a rounded appearance In the prism 

 zone. The top base is also slightly striated and in some crystals rounded. 



FIGURE 10. Crystal 4, wedge-shaped habit, which has sharp, distinct faces, not rounded as in figure 9. 

 Forms: c{001>, 6{010}, a{100>, m{110}, J{ 210}, /{Oil}. 



FIGURE 11. Peculiar shape of crystals of wedge-shaped habit caused by cleavage on 6{010}. Crystal No. 2. 

 Forms: c{001>, 6(010}, m<110}, f{210},/{011}. 



m 



FIGUKE 12. Crystal of a short prismatic, somewhat FIGURE 13. Crystal of rhombic habit, nearly equi- 

 flattened habit. Forms: c{G01}, &{010>, a{100}, dimensional. Compare with figure 7, p. 57. 

 7n{110}, /{210},/{011}. Crystal No. 24. Forms: fr{010}, a <100}, <{102}. 



