Cross Parts: Faceting Design Diagram

Beryl (Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl)

Cross Parts - Reflector (MC25.JRG)
By Jeff R. Graham
Copyright 1999
91.8% Light Return
Angles for R.I. = 1.56
13 facets + 4 facets on girdle = 17
2-fold, mirror-image symmetry
96 index
L/W = 3.000 T/W = 2.809 T/L = 0.936
P/W = 0.435 C/W = 0.236
H/W = (P+C)/W+0.02 = 0.691
P/H = 0.629 C/H = 0.342
Vol./W^3 = 1.241

Addition # 4 - This seems simple, but it is not as easy as it looks. I use this in various L/W, to cut crosses. In the center I usually put a square or round brilliant. Can be cut any ratio without a problem. This is good for Tourmaline, and Topaz too.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler