Iota: Faceting Design Diagram

Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Iota (CHECK64.JRG)
By Jeff R. Graham
Copyright 2003
88.2% Light Return
Angles for R.I. = 1.54
93 facets + 8 facets on girdle = 101
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.343
T/L = 0.343 P/W = 0.446 C/W = 0.146
H/W = (P+C)/W+0.02 = 0.612
P/H = 0.729 C/H = 0.239
Vol./W^3 = 0.185

Addition # 8 - Notice that the burst on the pavilion only meets the breaks at two places/break on each side. Cut in refractive indexes 1.54 to 2.14 (91.3%) with no changes. This works well in about any colored material.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler