PLATE 23 



Projections of wollastonite crystals, showing the different types and com- 

 binations of forms. Figure 1 is the type most common for wollastonite. Figures 

 2 and 3 are types common at Crestmore. The left half of figure 3 is the rear 

 of the right half drawn to show a center of symmetry only, if the crystal were 

 doubly terminated. Figures 4 and 5 are orthographic projections of the ends, 

 showing better the front and rear faces and the absence of an axis of symmetry. 



[358] 



