550 



REPORT OF NATIONAL MUSEUM, 1900. 

 TRAP BRILLIANT CUT. 



// 

 Fig. 17. 



THE TRAP BRII.I.I.VNT. 



Top (a), .side (b), and back (c) view. 



The trap brilliant, or .split brilliant, diflfer.s from the full brilliant i 

 havini^ the foundation squares divided horizontally into two trianyula 

 facet.s, niakini>" 42 in all. \ 





PORTUGUESE CUT. 



b 

 Fig. 18. 



THE PORTUGUESE CUT. 



Top (a), side (6), and back (c) view. 



The figures show the top, side, and bottom views of the Portuguese 

 cut, which has two rows of rhomboidal and three rows of triangular 

 facets above and below the o-irdle. 



STAR CUT. 



Fig. 19. 

 THE STAR CUT. 



Front (a) and back (b) view. 



The figures show the front and back view^s of the star cut. The 

 table i.s hexagonal in shape, and is one-fourth of the diameter of the 



