Trap Swirl: Faceting Design Diagram

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