Faceting Design Diagram: D-Aqua 1- Beryl – Aquamarine, Emerald, Helidore, Bixbite, Goshenite, Morganite, Golden Beryl


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

D-Aqua 1 (AQUA1.JRG)
By Jeff R. Graham
Copyright 1993
75.5% Light Return
Angles for R.I. = 1.56
65 facets + 16 facets on girdle = 81
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.490 T/L = 0.490
P/W = 0.510 C/W = 0.230
H/W = (P+C)/W+0.02 = 0.759
P/H = 0.671 C/H = 0.303
Vol./W^3 = 0.281

Gram Book 1 – If you cut this design to center point you will waste a lot of material. It’s best to cut a preform, and use the information under heading for sizes. It’s very deep to help darken light material, almost no light is lost. Notice the darker areas on the Random light ray trace, this will help make lighter material look darker when cut, 1ct+. Cut in refractive index 1.56 to 2.14 (80.5%) 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.