Faceting Design Diagram: Shadow Star – Opal – Jelly, Cherry, Orange, Clear


Opal (Jelly, Cherry, Orange, Clear)

Shadow Star (OPAL4.JRG)
By Jeff R. Graham
Copyright 1993
63% Light Return
Angles for R.I. = 1.45
36 facets + 5 facets on girdle = 41
5-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.553 T/L = 0.526
P/W = 0.509 C/W = 0.224
H/W = (P+C)/W+0.02 = 0.753
P/H = 0.676 C/H = 0.297
Vol./W^3 = 0.281

Addition # 3 – Cutting a preform will save rough. Yes, the P4 facets are below the critical angle (C.A.) that’s why I frost them and sometimes the P1’s too. It gives the stone a nice star effect. The P4 can be left off too, if you want. This will work in Moldivite… Cut in refractive indexes 1.45 to 2.14 (72%) 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.