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


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

Blue Ribbon (AQUA3.JRG)
By Jeff R. Graham
Copyright 1993
70% Light Return
Angles for R.I. = 1.56
81 facets + 16 facets on girdle = 97
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.635 T/L = 0.635
P/W = 0.449 C/W = 0.194
H/W = (P+C)/W+0.02 = 0.663
P/H = 0.678 C/H = 0.292
Vol./W^3 = 0.245

Gram Book 1 – Here is an unusual design that is a little different to cut. Cut P4 at exactly the right degree (42) and to center point, and you should get the right sizes. P6 is cut to center point, cut evenly, 1-8cts. Cut in refractive index 1.56 to 1.76 (75.6%) with no changes.


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.