Faceting Design Diagram: Triga Light House – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Triga Light House (MC72.JRG)
By Jeff R. Graham
Copyright 2002
80.2% Light Return
Angles for R.I. = 1.54
58 facets + 6 facets on girdle = 64
3-fold, mirror-image symmetry
96 index
L/W = 1.036 T/W = 0.509 T/L = 0.492
P/W = 0.420 C/W = 0.194
H/W = (P+C)/W+0.02 = 0.633
P/H = 0.663 C/H = 0.306
Vol./W^3 = 0.204

Addition # 7 – This is brighter than the ray trace might lead you believe. Cut it in lightly saturated material, notice that it’s deep. This is similar to my original “Light house” cut, only in a trillion shape, of course. Cut this in refractive indexes 1.54 to 1.93 (86%) with no changes.


Random – Cosine – ISO

 

Detailed faceting instructions by Jeff Graham available at The Rock Peddler