150 



upon their edges, often very distinct and in every direc- 

 tion. It may be observed that their edges are parallel 

 to the diagonal of the nucleus, therefore it becomes rect- 

 angular. The present specimen has small corner facets, 

 parallel to the faces of the primitive or nucleus. One end 

 has bevelled faces on either side, the angles measuring 

 about 128°, which are parallel to the small triangular facets 

 on the lower figure of Tab. 70. The other has three bevel- 

 lings. See the geometrical figure. 



