Faceting Design Diagram: King Beryl – Beryl – Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl


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

King Beryl (B41.JRG)
By Jeff R. Graham
Copyright 2001
82.1% Light Return
Angles for R.I. = 1.56
53 facets + 12 facets on girdle = 65
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.761 T/L = 0.572
P/W = 0.606 C/W = 0.181
H/W = (P+C)/W+0.02 = 0.807
P/H = 0.751 C/H = 0.224
Vol./W^3 = 0.439

Addition # 5 – This works in R.I. 1.54 (80.1%) to 1.71 (83.3%) with no changes. I designed this for Beryl crystal shapes, there are not a lot of designs that utilize them well. It is a “Money Cut”…


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.