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


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

Buff (B35.JRG)
By Jeff R. Graham
Copyright 2001
84.9% Light Return
Angles for R.I. = 1.56
73 facets + 12 facets on girdle = 85
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.766 T/L = 0.576
P/W = 0.665 C/W = 0.189
H/W = (P+C)/W+0.02 = 0.874
P/H = 0.761 C/H = 0.216
Vol./W^3 = 0.524

Addition # 5 – This is pretty nice design, a preform is a good idea. This works in R.I. 1.54 to 1.93 (86.6%). It is deep and will help deepen light colors.


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.