A Contribution to the Study of the Diamond Made. 
155 
Composite types and irregular forms are common: 
Ex. 1. — A nearly complete Bultfontein crystal with rounded edges and a 
shield " face not indented with triangles. On a cleavage plane roughly 
^ (a) Side view. 
(b) Plan. 
Fig. 2. — Wesselton made, enlarged. 
parallel to the shield a thin flake had grown macling the diamond. This 
flake was much less rounded than the rest and had numerous triangular 
indentations on its face. 
Fig. 3. — A Bultfontein made. 
The dimensions of the diamond were : 
Length of edge, 7*6 mm. 
Thickness of whole diamond perpendicularly to the twinning plane, 
6'3 mm. 
Thickness of macling flake, 0*8 mm. 
