Faceting Design Diagram: Trap Swirl – Cubic Zirconia


Cubic Zirconia

Trap Swirl (CZ8.JRG)
By Jeff R. Graham
Copyright 1993
75% Light Return
Angles for R.I. = 2.20
37 facets + 6 facets on girdle = 43
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.581 T/L = 0.503
P/W = 0.452 C/W = 0.213
H/W = (P+C)/W+0.02 = 0.684
P/H = 0.660 C/H = 0.311
Vol./W^3 = 0.286

Gram Book 1 – Do not let the low reflected light return fool you! This is a great cut, almost all of the light entering this design is trapped and it has extra high dispersion. Light to med material, 1/2-4cts. Cut in refractive index 1.76 (76.9%)to 2.14 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.