Faceting Design Diagram: Cross Parts – Reflector – Beryl – Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl


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

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.